Orthogonal alternatives
TL;DR: 12 companies doing similar work to Orthogonal in B2B, ranked by how closely they match what Orthogonal 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 Orthogonal. They are scored on how closely their own description overlaps with Orthogonal's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Orthogonal?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| primitive | communication for agents | Spring 2026 | 4 | Active |
| Dialogus | voice AI agents that learn how your company actually works | Summer 2026 | 3 | Active |
| Terse | Durable state for AI agents | Fall 2026 | 2 | Active |
| Magma | Monetize your agent's traces. | Summer 2026 | 1 | Active |
| PhoneSys | The Phone System for Sales Teams. | Summer 2011 | 4 | Inactive |
| IncidentFox | AI SRE agent that triages, coordinates, and fixes production incidents | Winter 2026 | 2 | Active |
| Memorable | reducing agent reasoning into a graph search problem | Summer 2027 | 2 | Active |
| Ardent | Database sandboxes for Agents | Spring 2026 | 3 | Active |
| Mailwarm | Prevents your emails from landing in spam. | Summer 2020 | 10 | Active |
| Amulet | High performance file system for agents | Summer 2026 | 2 | Active |
Is Orthogonal still active?
Orthogonal 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 Orthogonal. They are then ranked on how closely their own description overlaps with Orthogonal's, so the closest matches come first rather than whoever happens to share a tag.