Sendblue
YC S23New York City, US · Founded 2023 · 50 employees · Hiring · 2 known investors
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Sendblue provides an iMessage API and business messaging platform that enables companies to send and receive real iMessages with automatic fallback to RCS and SMS. It serves sales teams and enterprises that need reliable customer communication through the messaging channel.
Also known as Round One Inc. · Raz · Round One · Round One, Raz, Sendblue, Raz
Founders & leadership· Y Combinator alumni (S23)
Sendblue was founded in 2023 by Rob Haber and Alex Luis.


Investors · 2
How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us
How we know: Y Combinator's founder network · Not right? Tell us
Related companies · 2
Companies working in the same space as Sendblue.
Legal entities · 1
corporate structureIn the news
Frequently asked questions
- What does Sendblue do?
- Sendblue provides an iMessage API and business messaging platform that enables companies to send and receive real iMessages with automatic fallback to RCS and SMS. It serves sales teams and enterprises that need reliable customer communication through the messaging channel.
- Who founded Sendblue?
- Sendblue was founded by Rob Haber, Alex Luis in 2023.
- Who are Sendblue's investors?
- Sendblue's investors include Y Combinator, Twenty Two Ventures.
- Where is Sendblue headquartered?
- Sendblue is headquartered in New York City, US.


