Tetra alternatives
TL;DR: 12 companies doing similar work to Tetra in B2B, ranked by how closely they match what Tetra 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 Tetra. They are scored on how closely their own description overlaps with Tetra's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Tetra?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Snapboard | — | Winter 2020 | 2 | Inactive |
| Insoshi | — | Winter 2008 | — | Inactive |
| Thinkature | — | Summer 2006 | — | Inactive |
| Acunote | — | Winter 2011 | — | Active |
| ZumoDrive | Media in the cloud | Summer 2007 | 15 | Acquired |
| Fithub | — | Winter 2010 | — | Inactive |
| Post.fm | New email inbox. | Summer 2010 | — | Inactive |
| Dropbox | Backup and share files in the cloud. | Summer 2007 | 4000 | Public |
| Retool | Build internal tools fast. | Winter 2017 | 300 | Active |
| ZeroMailer | Easy mailing lists | Summer 2012 | 2 | Acquired |
| Emailio | Email built for wellness | Winter 2014 | 5 | Active |
| Kiko | We're the best online calendar solution to ever exist. Period. | Summer 2005 | — | Acquired |
Is Tetra still active?
Tetra 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 Tetra. They are then ranked on how closely their own description overlaps with Tetra's, so the closest matches come first rather than whoever happens to share a tag.