Fabius alternatives
TL;DR: 12 companies doing similar work to Fabius in B2B, ranked by how closely they match what Fabius 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 Fabius. They are scored on how closely their own description overlaps with Fabius's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Fabius?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Champ | AI SDR | Summer 2022 | 1 | Active |
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Infer | Operating system for insurance agencies | Summer 2021 | 9 | Active |
| Wingman | Wingman helps inside sales reps with coaching while they're on a call. | Summer 2019 | 10 | Acquired |
| Convex | Software for the commercial services industry. | Winter 2019 | 110 | Acquired |
| Centralize | The relationship intelligence platform for enterprise revenue | Winter 2024 | 9 | Active |
| Relate | All-in-One Sales and Marketing CRM for B2B teams | Summer 2022 | 7 | Active |
| Flockjay | AI-driven learning, content, and coaching for sales teams | Winter 2019 | 10 | Active |
| SilkChart | AI Sales Assistant to increase playbook adoption and win more deals | Summer 2022 | 8 | Active |
| Ergo | Ergo is the context layer that helps revenue teams close more deals. | Winter 2025 | 9 | Active |
| VOIQ | Conversational AI VoiceBots for Business | Summer 2015 | 8 | Inactive |
Is Fabius still active?
Fabius is no longer listed as active, so anyone still relying on it should plan a migration to one of the alternatives above.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Fabius. They are then ranked on how closely their own description overlaps with Fabius's, so the closest matches come first rather than whoever happens to share a tag.