Nebula Proxy: How it works, how to use it, and when you need an alternative

In this guide, we will explore how you can use Nebula Proxy to get the best experience. We will also discuss how it works, its limitations, how it compares with VPNs, other proxy alternatives and a lot more. By the end, you will have all the information you need to get started using Nebula Proxy and when to choose alternatives. So, without wasting any more of your time, let’s jump right in!

Key takeaways

• Nebula Proxy is a free, open-source browser proxy popular for getting past school and office firewalls.
• It’s safe enough for everyday casual browsing, but carries every free proxy’s limitations such as shared IPs, frequent blocks, and no official support.
• Two unrelated projects share the “Nebula” name; this article covers the browser unblocker by Nebula Services and not Slack’s mesh VPN.
• Real world projects, including web scraping, multi-accounting, SEO monitoring, and ad verification require commercial residential, ISP, or mobile proxies instead.
• There’s no account, no client, and no installation required to use Nebula proxy; it runs entirely in the browser.
• Self-hosting your own instance is the most reliable way to reduce the risks covered later in this guide.

What is Nebula Proxy

Nebula Proxy is a free, open-source proxy endpoint that anyone can use to route their traffic and access restricted websites. It is a web interface with a search bar, not a pool of purchasable IPs that you can configure on your device system settings. Nebula Proxy is maintained by Nebula Services and is especially popular with students and first-time proxy users, thanks to its simple no-install interface. 

How Nebula Proxy works: the intermediary principle

When you visit the Nebula, your browser only talks to its web page. Nebula then fetches the target site and hands it back through its front end, so a filter or your ISP sees only the proxy’s domain; it is essentially like a courier carrying your request in a sealed envelope. 

That means users can quickly get started routing their browser traffic without making any configurations or installing apps. To ensure the most privacy, Nebula proxy uses the Ultraviolet and Scramjet backends for encoding/obfuscation, keeps HTTPS encrypted end-to-end, and defaults search to DuckDuckGo as the search engine instead of Google or Bing.

The above schematic shows the intermediary principle at the heart of Nebula Proxy. The network filter only ever sees a single encrypted connection to the proxy domain, while the target website only ever sees the request arriving from the proxy’s IP.

Two different projects called Nebula: do not mix them up

When you search for “Nebula”, your search engine may show you two unrelated projects: the Nebula browser unblocker by Nebula Services (this article) and Slack’s Nebula, which is an open-source mesh VPN for linking company servers. You need to choose the former to access the Nebula proxy front end. 

Please note that there is no real “server-side Nebula Proxy” product; that’s an SEO invention blending the two. So, choose the proxy website if you need to route your traffic and access restricted sites.

Official resources and the mirror-list problem

Nebula has several entry points users can rely on to access the proxy. These include the GitHub repository (github.com/NebulaServices/Nebula), its Discord community (discord.gg/unblocker), and the live demo instance linked from the repo’s README.

There are also several “free Nebula mirror” lists, including school-themed domains, pages hosted on free platforms like Glitch and Cyclic, and “nebula proxy links” roundups recycled from past years. 

However, most of these domains become unusable within weeks, since administrators blocklist known proxy domains almost as fast as new ones appear. Beyond the short lifespan, entering anything on an unverified mirror means trusting a server run by someone you can’t identify. 

Some of these operators have no relationship to the original project at all, and a few can redirect to pages designed to harvest whatever you type in. We recommend sticking to the official demo or a self-hosted instance rather than working through a mirror list.

The current version: what changed in recent releases

Nebula has been through a real technical overhaul rather than a cosmetic refresh. It has now moved to a modern Astro/Svelte/Fastify stack, added Scramjet as a second backend alongside Ultraviolet, introduced a Marketplace for themes and plugins, and added PostgreSQL support. 

The latest tagged release is v9.1.4, though commits since suggest active ongoing development. That means more new features will be added even in the coming weeks.

What Nebula Proxy can do and what it gives you in practice

In this section, we will cover some of the key features of Nebula:

Technical features: backends, marketplace, stack, self-hosting

• Dual backends: The dual backends include Ultraviolet and Scramjet. That means a page that won’t load on one often works after switching to the other
• Marketplace: Nebula market place includes themes, plugins, and userscripts (as shown in the attached screenshot below), enabled by default on SQLite (PostgreSQL recommended at scale).
• Modern stack: Nebula runs on Astro, Svelte, Tailwind, and Fastify, which enables fast interface, frequent releases, and code anyone can audit rather than take on faith. 
• Self-hosting: It supports self hosting via terminal, Docker, or Docker Compose and won’t run on static hosts like Netlify, Vercel, or GitHub Pages, since it needs its own server

Privacy, unblocking and speed: what the user actually gets

• No install, no sign-up: You simply open the URL and start routing traffic to any website (as shown in the screenshots below).
• IP hidden from sites, not from the operator: This is a privacy layer and not full anonymity since Nebula can see the sites you intend to access.
• Best at school/office filters: Nebula is less effective against regional geo-blocks, which increasingly flag proxy IPs regardless of location
• Browser only: It can only be used with a browser and does nothing for apps outside it.
• Speed: Claimed caching/compression gains aside, public instances usually add latency rather than remove it. However, this has an insignificant impact on everyday casual browsing. 

How Slack’s Nebula differs from the Nebula Proxy browser tool

Slack’s Nebula is an overlay network, not a browser tool. It encrypts traffic between nodes, authenticates devices with certificates, and scales to thousands of hosts, letting a company securely link servers and offices across different locations. 

Slack’s Nebula solves “how do we connect our infrastructure,” not “how do I open a blocked site,” which is what the Nebula proxy tool is designed to do. Open source is the only similarity between the two projects. 

How to use Nebula Proxy: step-by-step instructions

Unblocking a site With Nebula proxy in 4 steps

1. Open a verified instance. The screenshot below shows the Nebula Proxy home page, ready for a URL or search query in the “Search the web freely” field.

2. Type a URL or search query that leads to one of  Nebula proxy URLs. The screenshot below shows the typing of a destination into the search field brings up autocomplete suggestions before you hit Enter.

3. Then browse your target website and close the tab. If a page breaks, switch backends and try accessing your target site again. The screenshot below shows the target site loads inside the proxy, with the Nebula navigation bar still visible at the top.

4. Check new IP: Use the free IP Checker from ProxyWing to check whether the sites you are accessing are actually seeing the new IP and not your real one. ProxyWing also offers the speed test tool and connection checker that you can use to verify the performance of the proxy URL.  The screenshot below shows the real IP (left, Uganda, 100% anonymity, no proxy detected) versus the IP seen when routed through Nebula Proxy (right, a US datacenter address flagged for VPN/proxy detection and WebRTC leak signals).

Using Nebula Proxy on several devices

Nebula proxy works on a number of devices since it’s a website, not a program. However, it does not offer sync between them. If you find guides that describe a “Nebula account” or client download, they’re simply describing something that doesn’t exist.

Your own instance: self-hosting the web proxy

Since Nebula is open source, you can choose to self-host it and run it on your infrastructure of your choice. Running your own instance takes a few steps:

• Clone the repository from GitHub
• Deploy it: Docker or Docker Compose is the recommended path. pnpm/Node also works for a manual setup
• Edit the config file to set it up the way you want
• Choose a database: SQLite by default, or PostgreSQL if the instance will see real traffic
• Ship it to a VPS: Nebula proxy won’t run on static hosts like Netlify or Vercel, since it needs its own server
• Once it’s live, check which ports are exposed with the free Port Scanner.

Some of the benefits of self hosting include keeping your own logs private, no strangers sharing your IP, and full control over speed and updates. It is the best way to reduce the risks covered later in this guide.

If you ever get stuck at any point when configuring a self-hosted instance, troubleshooting a backend, or just confirming a link is legitimate, the official README and documentation cover most common questions, and the Discord community can fill in the rest. Remember, this is help from enthusiasts and not paid support. There’s no SLA and no guaranteed response time, so plan accordingly if you’re relying on Nebula for anything time-sensitive.

Who Nebula Proxy suits, and who it does not

Despite the ease of use and other benefits Nebula offers, it is not the ideal tool for everyone. In this section, we will cover ideal use cases of this tool. 

Getting past school and office filters

Most admin filters will only see the proxy domain and not that of the site you intend to access. However, admins blocklist those domains (the proxy domains) fast, and bypassing one breaks institutional rules.

Private browsing

Using this proxy is fine for reading and searching, but not for valuable accounts or making transactions. Privacy from your network isn’t privacy from the proxy owner since they can see all the sites you access. 

Unblocking online games

With this proxy solution, you can get Nebula games unblocked past school restrictions on gaming and chess sites. However, its unstable ping can ruin anything fast-paced, these need static ISP proxies for the best experience.

Learning, testing and light automation

Nebula proxy is a good specimen for learning how web proxies work, and fine for light scripts. That’s where the open-source label earns its keep.

Jobs that need a network solution, not an unblocker

If what you actually need is secure remote access to internal resources, protected data exchange between cloud services, or encrypted communication between microservices, you’re solving a different problem than this article covers. That’s the territory of overlay networks and enterprise VPNs, including Slack’s Nebula, the project this one gets confused with.

What Nebula Proxy is not suitable for

Job	Why it fails	Use instead
Large-scale scraping	No rotation or stability at volume	Rotating residential proxy
Price monitoring	IPs lack trust and diversity	Rotating residential proxy
SEO and SERP analysis	No geo-targeting or rotation	Rotating residential proxy
Multiple accounts	No isolation or fingerprint control	Antidetect browser + ISP proxy
Banking	Unacceptable risk	A trusted VPN
Ad verification	Needs carrier IPs	Mobile proxies

Safety, legality and risks

How safe is Nebula Proxy

As earlier stated, it is a legitimate open source project with auditable code and encrypted HTTPS. But public IPs are widely blocked, and safety depends on whoever runs your instance. Self-hosting is the only reliable way to ensure maximum safety and privacy; but it can be expensive and complex. 

Is Nebula Proxy legal

It is legal in most countries. However, bypassing blocks may be unlawful under strict regulation, geo-restricted access breaches terms, and beating a school and work filter breaks its rules. Please note that this is not legal advice.

Can Nebula Proxy usage be traced, and what public instances risk

When using a Nebula proxy, admins see the proxy domain. Also the operators of the Nebula instance can see the traffic and may log it. That’s why you should never enter logins or payment details on a public instance.

Swapping your IP doesn’t mean you’re fully hidden since your browser can still leak your real address through WebRTC, or expose signs of automation through your TLS fingerprint. Testing with the free WebRTC Leak Test, WebRTC/UDP Checker, and TLS Fingerprint tools shows whether you’re actually protected or only appear to be.

In the above screenshot,  the IP Checker was run through Nebula Proxy: it flags a datacenter IP with VPN/proxy detection, an OS mismatch, and a WebRTC leak — a 37% anonymity score.

Rules for using it safely

• No banking: Never enter payment or financial details through a public instance
• No personal data: Avoid logins, passwords, or anything sensitive
• Use a self-hosted instance: This allows you to control the logs; an unknown operator doesn’t
• Pair with a VPN: For anything that actually matters, add a layer of real encryption
• Close the session when done: Don’t leave an active tab open on a shared device

The limits of Nebula Proxy: when to move to a professional service

Pros and cons at a glance

Pros	Cons
Free, no license fees	No dedicated IPs, rotation, or geo-targeting
Open code you can modify	Deployment needs technical knowledge
Customizable via themes and plugins	Performance depends on the hosting
Works on desktop, server, mobile	Community support only
Gets past regional and network blocks	Security depends on configuration
Hides the real IP, nothing to install	Not ready-to-run for non-technical users

The shared IP trap

When using a public Nebula proxy instance, thousands of users share the same datacenter IPs, so platforms blocklist them quickly, suspended accounts, 403 errors, and data with silent gaps. Check first with ProxyWing’s Proxy Tester and IP Tracing to determine how trustworthy that IP address is before using it. 

In the above screenshot, Instagram returns “Page isn’t available” through Nebula Proxy, which is the platform’s generic block response when a request comes from a flagged datacenter IP, rather than serving the actual profile.

Speed, latency and unreliable disposable links

Public instances run on free hosting, so latency offered is usually the bare minimum. Add the endless mirror hunt and the conclusion is obvious: you need infrastructure, not a better link. If you need the best performance, you will have to incur the cost of self-hosting. 

No professional features, geo-targeting or session control

Yes the Nebula proxy interface is customizable, but the operational controls aren’t there. No country selection, rotation rules, sticky sessions, or dedicated IPs; can be deal breakers when handling use cases that rely on those capabilities. 

No browser fingerprint control and no profile isolation

Changing your IP doesn’t change your fingerprint, so platforms still link accounts and can block access or restrict your account. Multi-accounting needs using an antidetect browser alongside a dedicated proxy solution. 

Support, protection and compliance

Since you’re relying on public instances, there is no SLA, no escalation path, no encrypted channel or private IPs, and no legal documents, which is a standalone risk for any business. Only viable for casual browsing and hobbyist projects. 

Alternatives to Nebula Proxy: classes of solutions and proxy types

Nebula Proxy versus Tor, VPNs and other browser proxies

• Tor buys anonymity at the cost of speed. 
• A VPN covers all system traffic but gets blocked more often by most sites
• Hidester and KProxy share Nebula’s free-tier ceiling. For full-system protection using WingVPN and its premium tier is the way to go.

Nebula Proxy versus commercial providers and antidetect browsers

	Nebula Proxy	Tor	VPN	Commercial proxy	Antidetect browser
Speed	Variable	Slow	Fast	Gigabit backbones	Fast
Privacy	IP masking only	Strong anonymity	Full-system encryption	Encrypted tunnels	Fingerprint + IP isolation
Filter bypass	Good, short-lived	Good, often blocked	Often blocked	Good, stable	Good, stable
Account work	No	No	No	Yes, with ISP IPs	Purpose-built for it
Price	Free	Free	Subscription	Per-GB or per-IP	Subscription + proxies

Nebula is a front end, not a managed network.

Professional proxy types and the jobs they do

Type	Job it fits	Key trait	From
Rotating residential	Collection, SEO, SERP	Fresh real-home IP per request	$1.00/GB
Static ISP	Accounts, storefronts	Datacenter speed, fixed residential IP	$1.71/IP/mo
Rotating mobile	Strict platforms, ad verification	Real carrier 4G/5G, rarely banned	$4.00/day
Rotating datacenter	Load testing, low-defense sites	Fastest and cheapest, easiest to detect	$0.87/mo
Unlimited bandwidth	Sustained volume	No per-GB metering	$0.90/IP

An overview of alternatives to Nebula Proxy

If Nebula Proxy doesn’t fit your use case, there are several trusted Nebula Proxy alternatives worth considering instead. In this section, we’ll cover the most reliable options across both proxy providers and VPNs.

ProxyWing

ProxyWing is one of the most reliable services, thanks to its focus on the core capabilities that most proxy users actually care about. It runs 70M+ IPs across 200+ countries, with residential coverage in 190+ locations and its largest pools concentrated in the US, India, Germany, the UK, and the Netherlands.

Proxy types

• Residential from $1.00 at volume (1GB entry at $2.50/GB, volume discounts up to 60%, traffic never expires);
• ISP from $1.71 per IP per month;
• Datacenter drawn from a 500K+ pool from $0.87;
• Mobile 4G/5G from $4.00

Session control

Rotation per request, or sticky sessions up to 1,000 minutes on standard plans and up to 7 days on premium — exactly the control Nebula Proxy fundamentally lacks.

Targeting

Country, city, and ISP, at no extra charge.

Technical

• HTTP/S;
• SOCKS5;
• UDP;
• TCP; 
• username/password authentication; 
• REST API for scripts.

NiuProxy

NiuProxy is a Hong Kong-based budget provider offering rotating and static residential, ISP, mobile, and datacenter proxies. It has a pool of 50M+ residential IP pool and coverage across 195+ countries. Offers all types of proxies with datacenter proxies starting from $0.5/GB. It also promises 99.9% uptime and 24/7 support.

IPRoyal

IPRoyal covers residential, ISP, datacenter, and mobile proxies in one account, with a 32M+ residential pool across 195+ countries. Residential IPs start around $1.75/GB, ISP from $2.40/proxy/month, and datacenter from $1.39/proxy. With IPRoyal, your purchased bandwidth doesn’t expire. Supports SOCKS5, rotation, sticky sessions up to 7 days, browser extensions, and in-house testing tools.

GloryCloud

GloryCloud offers a 90M+ IP pool across 195–200+ countries. It covers residential, ISP, mobile, and datacenter proxies. Residential pricing starts around $7/GB pay-as-you-go, with a free trial available. Promised uptime is 99.96%, with automatic rotation, sticky sessions, and HTTP(S)/SOCKS5 support. 

Multilogin

Multilogin offers a free plan, with paid tiers starting around $7.08/month billed annually. These scale up with profile count, proxy bandwidth, and automation features. Each profile gets a unique fingerprint with isolated storage, and proxy traffic is bundled in rather than sold separately.

OkeyProxy

OkeyProxy runs a 150M+ residential IP pool across 200+ countries. It also comes with SOCKS5 and HTTP(S) support, city and ISP-level targeting, and 99.9% promised uptime. Pricing starts around $0.35/GB, and new users get a small free trial that offers 1GB of rotating residential traffic (or a few static IPs). 

RapidSeedbox

RapidSeedbox is a seedbox-and-proxy combination for private storage and file distribution. As of mid-2026, plans start around €18/month (roughly $19) for the entry Fast tier. There’s a 14-day money-back guarantee on seedbox plans, plus separate IPv4/IPv6 proxy add-ons starting around $1/server.

Bright Data

Bright Data runs one of the largest proxy networks on the market with reported residential pool sizes of up to 400M+ IPs across 195+ countries, with city, ASN, and mobile carrier-level targeting. It also promises up to 99.9% uptime. It mainly targets the premium market with its pricing for residential proxies starting around $8/GB pay-as-you-go. 

Oxylabs

Another enterprise-focus provider that runs one of the largest residential proxy pools on the market with 175M+ IPs across 195+ countries. Oxylabs is backed by independent benchmarks showing strong success rates and low fraud scores. Their prices for datacenter proxies start at $6.75/month for 3 IPs.

Surfshark

Surfshark is one of the most popular VPN providers and offers 4,500+ servers across 100 countries, a no-logs policy, unlimited simultaneous devices on a single subscription. It also includes features like rotating IP, MultiHop double-encryption, and a kill switch. Pricing runs from roughly $2.49/month on the 2-year plan up to $16.45/month billed monthly, with a 30-day money-back guarantee on every tier.

NordVPN

NordVPN is another popular VPN provider and it runs roughly 9,300+ servers across 137 countries. It guarantees a strict no-logs policy independently audited by PwC, AES-256 encryption, an automatic kill switch. Pricing ranges from around $2.99–$3.49/month on 2-year plans up to about $13–$15/month billed monthly. 

A brief comparison of all the alternatives to Nebula Proxy

Provider	Core function	Pool & geography	Proxy types	Price from	Support	Best-fit tasks
ProxyWing	All-in-one proxy network	70M+ IPs, 200+ countries, residential in 190+ locations	Residential, ISP, datacenter, mobile	$0.87	24/7	Scraping, SEO, ad verification, multi-accounting
NiuProxy	Budget residential proxies	50M+ IPs, 195+ countries	Residential, ISP, mobile, datacenter	$0.5/GB (datacenter)	24/7	SEO monitoring, multi-accounting
IPRoyal	All-round proxy provider	32M+ IPs, 195+ countries	Residential, ISP, datacenter, mobile	$1.39/proxy (datacenter)	Standard	Scraping, price aggregation, SERP parsing
GloryCloud	Residential proxies + data collection	90M+ IPs, 195–200+ countries	Residential, ISP, mobile, datacenter	$7/GB (residential)	Standard	Done-for-you data collection
Multilogin	Antidetect browser	Bundled proxy traffic, plan-dependent	Residential (bundled)	Free plan available; paid from ~$7.08/mo	Standard	Multi-accounting, social marketing
OkeyProxy	Budget residential proxies	150M+ IPs, 200+ countries	Residential, datacenter	$0.35/GB (residential)	Standard	Light SOCKS5 use cases
RapidSeedbox	Seedbox + proxy	N/A (storage-focused)	IPv4/IPv6 proxy add-ons	From $1/IP	Live chat	Torrents, media storage/streaming
Bright Data	Enterprise proxy network	[verify pool size], 195+ countries	Residential, mobile, datacenter	$8/GB (residential)	Standard/Enterprise	Large corporate data collection
Oxylabs	Enterprise proxy network	175M+ IPs, 195+ countries	Residential, datacenter	From $6.5/month (for 3DC IPs)	Account managers	Web scraping, market research
Surfshark	VPN	4,500+ servers, 100 countries	N/A	$2.49/mo (2-yr plan)	24/7	Household privacy
NordVPN	VPN	9,300+ servers, 137 countries	N/A	$2.99–3.49/mo (2-yr plan)	24/7	Personal privacy

Free alternatives to Nebula Proxy and what they really cost

In this section we will cover a few more options for users that need a free Nebula proxy alternative.

What free options exist

Some of the popular options you can consider include:

• Hidester: It is a browser unblocker, encryption-focused, and best for quick, low-stakes browsing where you want a bit of cover without setup
• KProxy: It is speed-focused and good when you just need a fast, no-frills way to load a blocked page.
• Tor Browser: It offers real anonymity, but slow, and only worth it when genuine privacy matters more than convenience.

Premium proxy providers often offer their own free trials, which are a safer and more reliable way to test things than a random free proxy. These are worth considering if you’re handling a smaller project.

Separately, ProxyWing offers free tools like the IP checker, speed test, and leak-testing tool with no purchase required, and its cheap 1GB plan is a low-commitment way to test a paid proxy without significant spend.

Seven risks of free proxies

• No real data protection with the possibility of credentials and history leak
• You pay with your data
• False anonymity since your IP isn’t fully masked
• Poor quality experience due to slow speeds, caps, and frequent disconnects
• Malware risk  
• No support 
• Congestion and unpredictable failures

Remember, a free solution has a price, it just isn’t paid in money. 

How to choose the right solution for your task

Checklist: task to proxy type

Task	Proxy type
50+ social accounts	Static ISP
SEO and SERP parsing	Rotating residential
Mobile ads and apps	Mobile
Load testing, bulk requests	Rotating datacenter
Sustained volume	Unlimited plans
One-off filter bypass	Browser web proxy
Internal infrastructure	Overlay network or VPN

Criteria for choosing a provider

Beyond price per gigabyte, some of the other key factors you must consider include:

• Pool quality
• Targeting precision
• Guaranteed uptime with an SLA
• Protocol support
• API access
• Session flexibility
• Dashboard usability
• Customer support responsiveness
• Entry threshold
• Traffic expiry terms
• Legal transparency.

Case study: solving the detection problem

A company hit repeated 403s scraping prices through a browser proxy because the anti-bot system of the target website rejected the cloud-host IP. Switching to rotating residential proxies with per-request rotation and country targeting lifted the success rate substantially. 

Yes, the residential IPs can be more expensive, but with a significantly higher success rate, the price per successful request is lower than datacenter IPs. Stability is about the IP staying clean, not the server staying up.

Stay or switch: the migration checklist

Stay on Nebula if:

• You just need a one-off site unblock
• You’re learning how web proxies work
• You’re self-hosting for personal use

Switch if you need:

• Reliable residential IPs
• Data collection at any real volume
• To work across multiple accounts
• Commercial accountability for results and support that actually answers

If you’re switching, here’s the recommended plan:

• Define the core task you need the proxy for
• Buy the minimum package and test the pool against your own target sites
• Replace the browser proxy with a system-level SOCKS5 setup or an API integration in your script
• Track the share of successful requests and data quality before and after
• Record the time saved and the drop in bans

Start with 1GB of residential proxies to test the proxies against your real targets before going all in.

Conclusion: getting value from Nebula Proxy without illusions

Nebula Proxy is one of the best free open-source web proxies of 2026 with a strong entry point for school network bypass, learning, and self-hosting, and no substitute for a managed network. Still not sure if Nebula proxy is right for you, here is a brief summary to guide you:

• Student: the right tool
• Privacy-minded user: fine casually, but needs to be paired with a VPN
• Developer: great to learn from, not for production
• Marketer: needs geo-targeting and rotation, so Nebula is not ideal
• Business: compliance and support gaps rule Nebula proxy out

Before choosing a Nebula proxy alternative, pick the proxy type your task calls for, then test on minimal volume.