Castia alternatives
TL;DR: 12 companies doing similar work to Castia in Real Estate and Construction, ranked by how closely they match what Castia 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 Castia. They are scored on how closely their own description overlaps with Castia's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to Castia?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| Travo | . | Winter 2026 | 4 | Active |
| Laguna | — | Winter 2020 | 2 | Inactive |
| Spaces Life | — | Winter 2009 | — | Inactive |
| Sakneen | Shopify for Real Estate Developers | Winter 2020 | 9 | Active |
| Riley | MailChimp for SMS | Winter 2017 | 2 | Inactive |
| Smart Alto | Easiest way to set appointments with real estate leads | Winter 2017 | 8 | Inactive |
| Houm | All-in-one real estate marketplace for Latin America | Winter 2021 | 400 | Active |
| Naborly | A credit bureau for the renting generation. | Winter 2018 | 25 | Acquired |
| Jupe | Just add land | Summer 2021 | 7 | Inactive |
| Atmos | The entire homebuilding process, all online | Summer 2020 | 30 | Inactive |
| Union Apartment | Furnished Co-living Apartments for International Students, here in… | Winter 2019 | 12 | Inactive |
| hypcloud | A tech-enabled commercial mortgage broker. hypcloud allows property… | Summer 2018 | 14 | Acquired |
Is Castia still active?
Castia is no longer listed as active, so anyone still relying on it should plan a migration to one of the alternatives above.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with Castia. They are then ranked on how closely their own description overlaps with Castia's, so the closest matches come first rather than whoever happens to share a tag.