# Tor vs I2P: two anonymity networks, two different jobs URL: https://webvpn.org/anonymity/tor-vs-i2p/ Updated: 2026-09-11 Tor vs I2P compared honestly: design, speed, what each is for, exit nodes vs no exit, hidden services vs eepsites, and how to choose between them for a specific task. Tor and I2P are both anonymity networks that use layered encryption through volunteer relays, but they are built for different purposes. Tor is designed to reach the ordinary web anonymously and also hosts onion services; I2P is designed for services hosted inside the network, with every user acting as a relay and almost no path to the ordinary web. Choose Tor for anonymous browsing and I2P for anonymous hosting and peer-to-peer use. Comparisons of Tor vs I2P usually try to crown a winner, which misses the point. They overlap enough to be confused and differ enough that the right choice depends on what you are doing. This guide sets out the design differences, what those differences mean for speed and anonymity, how their hidden services compare, what the "I2P dark web" label does and does not mean, and a short decision guide for picking one or using both. ## Two designs for two goals Tor was designed as a low-latency anonymity network for the general internet. A client builds a circuit through three relays, run by a subset of volunteers, and the last relay, the exit, connects to ordinary websites. Onion services were added so that servers could also hide, but the network's centre of gravity is anonymous access to the open web, and Tor Browser is built around that. I2P was designed as an anonymous network layer for applications inside it. Every participant runs a router that relays for others. Tunnels are one-directional, with separate paths for inbound and outbound traffic, and services are addressed by cryptographic keys. Access to the ordinary web exists only through a few volunteer outproxies and is treated as a convenience rather than a goal. That single difference in orientation, outward versus inward, explains nearly every other contrast. ## Relays, exits and who carries the traffic In Tor, a few thousand volunteer relays carry traffic for millions of users, and exit relays are a distinct role with distinct risks; the exit node guide on this site explains why. Most Tor users are clients only, and the network has a directory of relays that clients consult and censors can read. In I2P, everyone relays. There is no directory of relays separate from the list of participants, no exit role for the general web, and no obvious way to tell a user from a relay. That makes I2P harder to enumerate and block by address, spreads load across all participants, and removes the exit-node trust problem. It also means your router is carrying strangers' encrypted traffic, which some people are comfortable with and others are not, and it means the network's health depends on users leaving routers running. ## Circuits versus tunnels, onions versus garlic Tor circuits are bidirectional: the same three relays carry your request out and the response back. Circuits last for around ten minutes and are shared across connections to the same site. I2P tunnels are unidirectional and short-lived; outbound and inbound traffic take different paths, and tunnels are rebuilt frequently. I2P also bundles multiple messages into single encrypted packages, which the project calls garlic routing, so an observer sees fewer and larger units. These choices give I2P different resistance to traffic analysis: an observer needs to correlate more paths to link a conversation. They also add latency and make the network slower to set up. Neither approach is universally stronger. Tor's design has been analysed for two decades by academic researchers and has been refined in response; I2P's design has interesting properties but has received far less scrutiny. ## Speed and startup Tor connects in seconds and browses the ordinary web at tolerable speed. It is slow for large downloads and discourages torrenting. I2P takes minutes to build its first tunnels and improves over hours and days as the router learns peers. Once integrated, services inside the network, especially file sharing, can perform reasonably, because peer-to-peer traffic is a designed use. Reaching the ordinary web through an outproxy is slow and unreliable. If your test of a network is "how fast does a normal website load", Tor wins by a wide margin. If your test is "how well does an anonymous torrent swarm work", I2P is the one built for it. ## Hidden services: onion sites versus eepsites Both networks host services whose location is hidden. Tor's onion services and I2P's eepsites are similar in concept: the server builds tunnels into the network and publishes an address derived from its key, and clients meet it inside the network. The differences are practical. Tor's onion space is far larger, includes major organisations' mirrors and secure submission systems, and has a well-known browser to reach it. I2P's eepsites are fewer, more community-oriented, and reached through a configured browser profile plus a local address book system, as the I2P sites guide on this site describes. Hosting is arguably easier on I2P, where the router console includes a web server and the whole design assumes you might host something; on Tor, hosting an onion service is well documented but a separate setup. ## The "I2P dark web" label Because I2P hosts hidden services, it is sometimes described as a dark web or as an alternative to the Tor dark web. Technically the label fits both networks equally: hidden services are hidden services. In practice, I2P's content skews toward forums, wikis, blogs, mirrors and file sharing, and its community is small enough that reputation matters. The label tells you how sites are hosted, not what is on them, and it should not shape your expectations in either direction. As on any unmoderated network, treat unknown sites with caution and never enter personal information. ## Which to use: a decision guide Match the network to the task. - Browsing ordinary websites anonymously, reading blocked news, or contacting someone through their normal site: Tor Browser. - Reaching an organisation's onion service, such as a newsroom's secure drop or a privacy provider's onion mirror: Tor Browser. - Hosting a site, forum or service anonymously with minimal setup: I2P, though Tor onion services are also good. - Anonymous peer-to-peer file sharing: I2P, which is built for it; do not torrent over Tor. - Participating in a small, inward-facing anonymous community: I2P. - Anything where the size of the crowd is your protection, such as being one anonymous user among millions: Tor. - Both hosting and browsing: run both. They coexist without conflict. ## What researchers and both projects say The comparison here follows what the two projects and independent researchers have stated about their own and each other's designs. The Tor Project describes Tor as a low-latency network optimised for anonymous web access, acknowledges that it does not defend against an adversary observing both ends of a circuit, and relies on its large, diverse network to make that hard. The I2P project describes itself as a network layer for applications inside the network, states that outproxy access is not a design goal, and asks users to leave routers running because anonymity improves with participation. Academic comparisons of the two networks have generally concluded that they optimise for different threat models and use cases, that Tor's far larger user base and research history make it the safer default for browsing, and that I2P's unidirectional tunnels and universal relaying give it distinct properties worth studying, while its smaller size remains a limitation. ## Pick by the job If you are here because you want to browse anonymously, install Tor Browser and stop comparing. If you want to host something anonymously or share files without exposing your address, install I2P, leave it running for a day, and explore. If you find yourself wanting both, run both; they were built for different corners of the same problem and get along fine on one machine. ## FAQ Q: Which is more anonymous, Tor or I2P? A: Neither is simply more anonymous. Tor has a far larger user base and two decades of research behind it, which strengthens its anonymity for browsing the ordinary web. I2P's design has properties that resist some analysis Tor is exposed to, but its smaller network is itself a limit. For most people and most tasks, Tor is the better-studied choice. Q: Is I2P the dark web? A: I2P hosts hidden services in the same technical sense as Tor's onion services, so some people call it a dark web. The content is mostly forums, wikis, mirrors and file sharing. The label describes the hosting method, not what is hosted. Q: Can I use I2P to browse normal websites? A: Only through a handful of volunteer outproxies, which are slow and require trusting the operator. I2P is not designed for that. Use Tor Browser for anonymous access to the ordinary web. Q: Is I2P faster than Tor? A: For services inside I2P, especially file sharing, it can perform well once your router is integrated. For reaching the ordinary web, Tor is faster and more reliable because that is what it is built for. I2P also takes longer to start up. Q: Can I run Tor and I2P at the same time? A: Yes. They are separate programs using separate ports and separate browser profiles. Running both is common among people who use I2P for hosting or file sharing and Tor for browsing.