Sendoid alternatives
TL;DR: 12 companies doing similar work to Sendoid in B2B, ranked by how closely they match what Sendoid 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 Sendoid. They are scored on how closely their own description overlaps with Sendoid's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Sendoid?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Acunote | — | Winter 2011 | — | Active |
| Snapboard | — | Winter 2020 | 2 | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Thinkature | — | Summer 2006 | — | Inactive |
| ZumoDrive | Media in the cloud | Summer 2007 | 15 | Acquired |
| Fithub | — | Winter 2010 | — | Inactive |
| Post.fm | New email inbox. | Summer 2010 | — | Inactive |
| Retool | Build internal tools fast. | Winter 2017 | 300 | Active |
| ZeroMailer | Easy mailing lists | Summer 2012 | 2 | Acquired |
| Sherpa Labs | Frontier Data | Winter 2025 | 5 | Active |
| Emailio | Email built for wellness | Winter 2014 | 5 | Active |
| Fibo | SaaS calendar and messaging for SMBs | Winter 2017 | 15 | Inactive |
Is Sendoid still active?
Sendoid 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 Sendoid. They are then ranked on how closely their own description overlaps with Sendoid's, so the closest matches come first rather than whoever happens to share a tag.