Blockspring alternatives
TL;DR: 12 companies doing similar work to Blockspring in B2B, ranked by how closely they match what Blockspring 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 Blockspring. They are scored on how closely their own description overlaps with Blockspring's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Blockspring?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Insoshi | — | Winter 2008 | — | Inactive |
| Fithub | — | Winter 2010 | — | Inactive |
| Sherpa Labs | Frontier Data | Winter 2025 | 5 | Active |
| Magma | Monetize your agent's traces. | Summer 2026 | 1 | Active |
| primitive | communication for agents | Spring 2026 | 4 | Active |
| Dialogus | voice AI agents that learn how your company actually works | Summer 2026 | 3 | Active |
| PhoneSys | The Phone System for Sales Teams. | Summer 2011 | 4 | Inactive |
| Memorable | reducing agent reasoning into a graph search problem | Summer 2027 | 2 | Active |
| GoScale | Dynamical Scaling Virtual Machines as a Service | Summer 2012 | 2 | Inactive |
| Terse | Durable state for AI agents | Fall 2026 | 2 | Active |
| Segment | Software and APIs to collect, clean, and control customer data. | Summer 2011 | 550 | Acquired |
| Optilly/Installmonetizer | Fb ad optimization platform | Winter 2012 | 11 | Inactive |
Is Blockspring still active?
Blockspring has been acquired, which often means pricing, roadmap or support changes. That is the usual reason people start looking at this list.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Blockspring. They are then ranked on how closely their own description overlaps with Blockspring's, so the closest matches come first rather than whoever happens to share a tag.