Collar alternatives
TL;DR: 12 companies doing similar work to Collar in B2B, ranked by how closely they match what Collar 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 Collar. They are scored on how closely their own description overlaps with Collar's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Collar?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Optilly/Installmonetizer | Fb ad optimization platform | Winter 2012 | 11 | Inactive |
| Brushes | iPad drawing software. | Summer 2010 | — | Inactive |
| HelloSign | eSignature software for small and mid-market businesses. | Winter 2011 | 100 | Acquired |
| GiveSpark | Givespark was a celebrity charity fundraising platform | Winter 2012 | 1 | Inactive |
| Mailgun | Email API service. | Winter 2011 | 51 | Acquired |
| Custora | Custora is a predictive analytics platform for e-commerce marketing… | Winter 2011 | 11 | Acquired |
| BookSolid | BookSolid is the opentable for tour operators. | Winter 2012 | — | Inactive |
| SolidStage | Sysadmin as a service. We make deploying, configuring, monitoring,… | Winter 2012 | — | Inactive |
| Syncly | Social listening for the video era | Winter 2023 | 15 | Active |
| Terminal Use | AI-native transformation for operations-heavy companies | Winter 2026 | 4 | Active |
Is Collar still active?
Collar 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 Collar. They are then ranked on how closely their own description overlaps with Collar's, so the closest matches come first rather than whoever happens to share a tag.