Rational alternatives
TL;DR: 12 companies doing similar work to Rational in B2B, ranked by how closely they match what Rational 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 Rational. They are scored on how closely their own description overlaps with Rational's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Rational?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Zip | The future of B2B spend | Summer 2020 | 500 | Active |
| Bicycle AI | Bicycle AI provides customer support as a service. We work on top of… | Winter 2017 | 11 | Inactive |
| Seal | All-in-one workspace for companies making regulated products | Summer 2020 | 22 | Active |
| Serve AI | AI for Field Service Enterprises | Summer 2024 | 6 | Active |
| Walter | AI Employee for Manufacturing Operations | Spring 2026 | — | Active |
| Smartbase | AI-native ERP for manufacturers | Spring 2026 | 2 | Active |
| Toma | AI Applied Research | Winter 2024 | 20 | Active |
| gaiia | all-in-one operating system (OS) for telcos | Winter 2021 | 100 | Active |
| HiOperator | Customer support as a service. | Summer 2016 | 200 | Active |
| MochaCare | Agentic Management Service for Care Organizations | Winter 2026 | 2 | Active |
Is Rational still active?
Rational 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 Rational. They are then ranked on how closely their own description overlaps with Rational's, so the closest matches come first rather than whoever happens to share a tag.