Twenty alternatives
TL;DR: 12 companies doing similar work to Twenty in B2B, ranked by how closely they match what Twenty actually does — not just by category.
How this list was built: every company here is Y Combinator-backed and shares at least one category with Twenty. They are scored on how closely their own description overlaps with Twenty's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Twenty?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Omnara | The Open-Source Alternative to Claude Managed Agents | Summer 2025 | 4 | Active |
| /dev/fast | /dev/fast is the AI-native code forge | Winter 2026 | 4 | Active |
| Swiftype | Smart search for the modern team. | Winter 2012 | 50 | Acquired |
| Citus Data | Real-time. Big data. PostgreSQL | Summer 2011 | 45 | Acquired |
| Bytebot | Bytebot is the open source container for AI desktop agents. | Summer 2021 | 3 | Acquired |
| Reflex | The operating system for building mission-critical enterprise apps. | Winter 2023 | 10 | Active |
| Riften | Earned intelligence for every company | Summer 2026 | 5 | Active |
| Char | The AI notepad that knows and works for you | Summer 2025 | 3 | Active |
| Flotype | Third generation of web apps. | Winter 2011 | 2 | Inactive |
| OpenSpec | Plan mode for complex features | Winter 2026 | — | Active |
Is Twenty still active?
Twenty is still operating, so switching is a choice rather than a forced migration. Compare on fit and price rather than urgency.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Twenty. They are then ranked on how closely their own description overlaps with Twenty's, so the closest matches come first rather than whoever happens to share a tag.