SID alternatives
TL;DR: 12 companies doing similar work to SID in B2B, ranked by how closely they match what SID 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 SID. They are scored on how closely their own description overlaps with SID's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to SID?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Eivod | — | Summer 2007 | 51 | Inactive |
| Stackq | — | Summer 2009 | — | Inactive |
| BitSample | — | Winter 2008 | — | Inactive |
| Brushes | iPad drawing software. | Summer 2010 | — | Inactive |
| Fithub | — | Winter 2010 | — | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Confluence Labs | AI models that learn from experience | Winter 2026 | 2 | Active |
| Atrisa | AI Agents for Analog Circuit Design | Spring 2026 | 3 | Active |
| SolidStage | Sysadmin as a service. We make deploying, configuring, monitoring,… | Winter 2012 | — | Inactive |
| Audobox | Audobox is a developer and user friendly tool for in-app feedback. | Summer 2013 | — | Inactive |
| Clickpass | — | Summer 2007 | 11 | Acquired |
| Mailgun | Email API service. | Winter 2011 | 51 | Acquired |
Is SID still active?
SID 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 SID. They are then ranked on how closely their own description overlaps with SID's, so the closest matches come first rather than whoever happens to share a tag.