I2P follows an incremental development model with releases approximately every 13 weeks. This roadmap covers desktop and Android Java releases in a single, stable release path.
Last Updated: August 2025
🎯 Upcoming Releases
Version 2.11.0
Target: Early December 2025
- Hybrid PQ MLKEM Ratchet final, enable by default (prop. 169)
- Jetty 12, require Java 17+
- Continue work on PQ (transports) (prop. 169)
- I2CP lookup support for LS service record parameters (prop. 167)
- Per-tunnel throttling
- Prometheus-friendly stat subsystem
- SAM support for Datagram 2/3
📦 Recent Releases
2025 Releases
Version 2.10.0 — Released September 8, 2025
- i2psnark UDP tracker support (prop. 160)
- I2CP LS service record parameters (partial) (prop. 167)
- I2CP async lookup API
- Hybrid PQ MLKEM Ratchet Beta (prop. 169)
- Continue work on PQ (transports) (prop. 169)
- Tunnel build bandwidth parameters (prop. 168) Part 2 (handling)
- Continue work on per-tunnel throttling
- Remove unused transport ElGamal code
- Remove ancient SSU2 “active throttle” code
- Remove ancient stat logging support
- Stat/graph subsystem cleanup
- Hidden mode improvements and fixes
Version 2.9.0 — Released June 2, 2025
- Netdb map
- Implement Datagram2, Datagram3 (prop. 163)
- Start work on LS service record parameter (prop. 167)
- Start work on PQ (prop. 169)
- Continue work on per-tunnel throttling
- Tunnel build bandwidth parameters (prop. 168) Part 1 (sending)
- Use /dev/random for PRNG by default on Linux
- Remove redundant LS render code
- Display changelog in HTML
- Reduce HTTP server thread usage
- Fix auto-floodfill enrollment
- Wrapper update to 3.5.60
Version 2.8.2 — Released March 29, 2025
- Fix SHA256 corruption bug
Version 2.8.1 — Released March 17, 2025
- Fix installer failure on Java 21+
- Fix “loopback” bug
- Fix tunnel tests for outbound client tunnels
- Fix installing to paths with spaces
- Update outdated Docker container and container libraries
- Console notification bubbles
- SusiDNS sort-by-latest
- Use SHA256 pool in Noise
- Console dark theme fixes and improvements
- .i2p.alt support
Version 2.8.0 — Released February 3, 2025
- RouterInfo publishing improvements
- Improve SSU2 ACK efficiency
- Improve SSU2 handling of dup relay messages
- Faster / variable lookup timeouts
- LS expiration improvements
- Change symmetric NAT cap
- Enforce POST in more forms
- SusiDNS dark theme fixes
- Bandwidth test cleanups
- New Gan Chinese translation
- Add Kurdish UI option
- New Jammy build
- Izpack 5.2.3
- rrd4j 3.10
📅 2024 Releases
Version 2.7.0 — October 8, 2024
- i2ptunnel HTTP server reduce thread usage
- Generic UDP Tunnels in I2PTunnel
- Browser Proxy in I2PTunnel
- Website Migration
- Fix for tunnels going yellow
- Console /netdb refactoring
Version 2.6.1 — August 6, 2024
- Fix iframe size issues in console
- Convert graphs to SVG
- Bundle translation status report
Version 2.6.0 — July 19, 2024
- Reduce netdb memory usage
- Remove SSU1 code
- Fix i2psnark temp file leaks and stalls
- More efficient PEX in i2psnark
- JS refresh of console graphs
- Graph rendering improvements
- Susimail JS search
- More efficient message handling at OBEP
- More efficient local destination I2CP lookups
- Fix JS variable scoping issues
Version 2.5.2 — May 15, 2024
- Fix HTTP truncation
- Publish G capability if symmetric NAT detected
- Update to rrd4j 3.9.1-preview
Version 2.5.1 — May 6, 2024
- NetDB DDoS mitigations
- Tor blocklist
- Susimail fixes and search
- Continue removing SSU1 code
- Update to Tomcat 9.0.88
Version 2.5.0 — April 8, 2024
- Console iframe improvements
- Redesign i2psnark bandwidth limiter
- Javascript drag-and-drop for i2psnark and susimail
- i2ptunnel SSL error handling improvements
- i2ptunnel persistent HTTP connection support
- Start removing SSU1 code
- SSU2 relay tag request handling improvements
- SSU2 peer test fixes
- Susimail improvements (loading, markdown, HTML email support)
- Tunnel peer selection adjustments
- Update RRD4J to 3.9
- Update gradlew to 8.5
Version 2.4.0 — December 18, 2023
- NetDB context management/Segmented NetDB
- Handle congestion capabilities by deprioritizing overloaded routers
- Revive Android helper library
- i2psnark local torrent file selector
- NetDB lookup handler fixes
- Disable SSU1
- Ban routers publishing in the future
- SAM fixes
- susimail fixes
- UPnP fixes
2023-2022 Releases
Click to expand 2023-2022 releases
Version 2.3.0 — Released June 28, 2023
- Tunnel peer selection improvements
- User-Configurable blocklist expiration
- Throttle fast bursts of lookup from same source
- Fix replay detection information leak
- NetDB fixes for multihomed leaseSets
- NetDB fixes for leaseSets received as a reply before being received as a store
Version 2.2.1 — Released April 12, 2023
- Packaging fixes
Version 2.2.0 — Released March 13, 2023
- Tunnel peer selection improvements
- Streaming replay fix
Version 2.1.0 — Released January 10, 2023
- SSU2 fixes
- Tunnel build congestion fixes
- SSU peer test and symmetric NAT detection fixes
- Fix broken LS2 encrypted leasesets
- Option to disable SSU 1 (preliminary)
- Compressible padding (proposal 161)
- New console peers status tab
- Add torsocks support to SOCKS proxy and other SOCKS improvements and fixes
Version 2.0.0 — Released November 21, 2022
- SSU2 connection migration
- SSU2 immediate acks
- Enable SSU2 by default
- SHA-256 digest proxy authentication in i2ptunnel
- Update Android build process to use modern AGP
- Cross-Platform(Desktop) I2P browser auto-configuration support
Version 1.9.0 — Released August 22, 2022
- SSU2 peer test and relay implementation
- SSU2 fixes
- SSU MTU/PMTU improvements
- Enable SSU2 for a small portion of routers
- Add deadlock detector
- More certificate import fixes
- Fix i2psnark DHT restart after router restart
Version 1.8.0 — Released May 23, 2022
- Router family fixes and improvements
- Soft restart fixes
- SSU fixes and performance improvements
- I2PSnark standalone fixes and improvements
- Avoid Sybil penalty for trusted families
- Reduce tunnel build reply timeout
- UPnP fixes
- Remove BOB source
- Certificate import fixes
- Tomcat 9.0.62
- Refactoring to support SSU2 (proposal 159)
- Initial implementation of SSU2 base protocol (proposal 159)
- SAM authorization popup for Android apps
- Improve support for custom directory installs in i2p.firefox
Version 1.7.0 — Released February 21, 2022
- Remove BOB
- New i2psnark torrent editor
- i2psnark standalone fixes and improvements
- NetDB reliability improvements
- Add popup messages in systray
- NTCP2 performance improvements
- Remove outbound tunnel when first hop fails
- Fallback to exploratory for tunnel build reply after repeated client tunnel build failures
- Restore tunnel same-IP restrictions
- Refactor i2ptunnel UDP support for I2CP ports
- Continue work on SSU2, start implementation (proposal 159)
- Create Debian/Ubuntu Package of I2P Browser Profile
- Create Plugin of I2P Browser Profile
- Document I2P for Android applications
- i2pcontrol improvements
- Plugin support improvements
- New local outproxy plugin
- IRCv3 message tag support
2021 Releases
Click to expand 2021 releases
Version 1.6.1 — Released November 29, 2021
- Accelerate rekeying routers to ECIES
- SSU performance improvements
- Improve SSU peer test security
- Add theme selection to new-install wizard
- Continue work on SSU2 (proposal 159)
- Send new tunnel build messages (proposal 157)
- Include automatic browser configuration tool in IzPack installer
- Make Fork-and-Exec Plugins Manageable
- Document jpackage install processes
- Complete, document Go/Java Plugin Generation Tools
- Reseed Plugin for self-signed HTTPS reseed
Version 1.5.0 — Released August 23, 2021
- Accelerate rekeying routers to ECIES
- Start work on SSU2
- Implement new tunnel build messages (proposal 157)
- Support dmg and exe automatic updates
- New native OSX installer
- X-I2P-Location(alt-svc) locations for built-in I2P Site
- RRD4J 3.8
- Create C, CGo, SWIG bindings for libi2pd
Version 0.9.50 — Released May 18, 2021
- Accelerate rekeying routers to ECIES
- UPnP IPv6 support
- 4/6 router address caps (proposal 158)
- IPv6 introducers (proposal 158)
- NTP year 2036 fixes
- Continue work on new tunnel build message (proposal 157)
- Enable DoH for reseeding
- Docker improvements
- SSU IPv6 fixes
- Persist Sybil blocklist
- Tunnel bandwidth limiter fixes
Version 0.9.49 — Released February 17, 2021
- SSU send individual fragments
- SSU Westwood+
- SSU fast retransmit
- SSU fix partial acks
- ECIES router encrypted messages
- Start rekeying routers to ECIES
- Start work on new tunnel build message (proposal 157)
- More SSU performance improvements
- i2psnark webseed support
- Start work on i2psnark hybrid v2 support
- Move web resources to wars
- Move resources to jars
- Fix Gradle build
- Hidden mode fixes
- Change DoH to RFC 8484
- Fix “Start on Boot” support on Android
- Add support for copying b32 addresses on Android
- Add SAMv3 Support to Android
- Revise CSS on default I2P Site
- Document I2P site setup
- Add icons to router console themes
- Complete transition to Git
- Donation page redesign
- Review and update VCS information
2020-2016 Historical Archive
Click to expand 2020-2016 releases (0.9.48 back to 0.9.24)
For the complete historical archive of releases from 2020 back to January 2016, including all versions from 0.9.48 to 0.9.24, see the full release notes on the I2P blog.
Major milestones from this era:
- 0.9.47 (August 2020): Required Java 8, ECIES enabled for some tunnels, Sybil analysis enabled by default
- 0.9.46 (May 2020): Replaced jrobin with rrd4j, ECIES testing
- 0.9.45 (February 2020): Full dual IPv4/IPv6 support, hidden mode fixes
- 0.9.44 (December 2019): Docker image, testnet Kubernetes, I2P Browser development
- 0.9.43 (October 2019): Preliminary ECIES support, SSU IPv6 peer testing, Red25519 signature support
- 0.9.42 (August 2019): Browser WebExtensions, Linux distribution ISO
- 0.9.41 (July 2019): Redesigned website navigation, router-side meta LS2 support
- 0.9.40 (May 2019): Decrypting LS2 support, disable NTCP1, Docker image
- 0.9.39 (March 2019): Redesigned website, encrypted LS2 support
- 0.9.38 (January 2019): New setup wizard with bandwidth testing, macOS installer enhancements, signed installers
- 0.9.37 (October 2018): NTCP2 enabled by default
- 0.9.36 (August 2018): NTCP2 implementation (disabled by default)
- 0.9.35 (June 2018): Susimail folders, Jetty 9.2.24
- 0.9.34 (April 2018): UPnP IGD 2 support, IPv6 improvements
- 0.9.33 (January 2018): Reseed proxy support, Jetty 9.2.22, Tomcat 8.5.23
- 0.9.32 (November 2017): Ignore hostnames in router infos (proposal 141)
- 0.9.31 (August 2017): Console redesign phase 1, i2psnark ratings
- 0.9.30 (May 2017): Hidden service server sigtype migration, Tomcat 8 / Jetty 9.2
- 0.9.29 (February 2017): Java 9 fixes, NTP hardening, Docker support
- 0.9.28 (December 2016): IPv6 improvements, blocklist enhancements
- 0.9.27 (October 2016): SSU IPv6 peer testing, hidden mode improvements
- 0.9.26 (June 2016): New subscription protocol, Wrapper 3.5.29, GMP 6.0
- 0.9.25 (March 2016): SAM v3.3, Sybil tool enhancements, QR codes
- 0.9.24 (January 2016): SAM v3.2, Require Java 7, NetDB Family, Ed25519 transition
Release Information
Release Cycle: Approximately every 13 weeks for major releases
Support Policy:
- Current release: Fully supported with updates and security patches
- Previous release: Security updates only
- Older releases: No longer supported (upgrade recommended)
Version Numbering:
- Started with 0.9.x series (through 0.9.66)
- Transitioned to 1.x series (1.5.0 through 1.9.0)
- Now in 2.x series (2.0.0+)
Development Resources
- Source Code: i2pgit.org
- Issue Tracker: GitLab issues
- Monthly Meetings: First Tuesday of each month
- IRC: #i2p-dev on IRC2P
- Release Notes: I2P Blog
Get Involved
Want to contribute to I2P’s future? Check out the Get Involved page to learn how you can help with development, testing, documentation, and more!
For the latest news and detailed release information, visit the I2P Blog.