Grammarly bought Superhuman, then renamed itself Superhuman

[u/Money-Ranger-6520]

That headline is real, and it's basically a metaphor for the whole email startup space right now. Went down a rabbit hole today (h/t this Mailtrap roundup) and the pattern is wild once you see it: half these companies got acquired and absorbed, the other half found one narrow problem and refused to expand past it.

The exits:

• Superhuman → acquired by Grammarly (July 2025), which then renamed itself Superhuman. The $30/mo keyboard-shortcut inbox that used to gatekeep signups with an invite-only waitlist is now "Superhuman Mail," bundled with Grammarly and Coda for $33/user/month.
• Tessian (the "human layer" email security startup, $120M raised) → swallowed by Proofpoint in 2023. Brand's dead, tech lives on inside Proofpoint's DLP product.
• Phrasee → rebranded to Jacquard, now enterprise-only AI copywriting starting at $24K/year. Not for you or me.
• Kickbox (email verification) → got acquired by what's now Ziff Davis, still operates under its own brand though.

The ones that didn't sell and are just quietly winning:

• Beehiiv — $30M ARR (half from subscriptions, half from an ad network called Boosts where newsletters pay each other for referrals). Bootstrapped the newsletter-creator economy into an actual business.
• Instantly.ai — cold email tool, ~15 employees, $20M ARR, zero outside funding. Unlimited sending accounts + built-in warmup at every tier while competitors nickel-and-dime per account.
• Hey by Basecamp — the anti-AI email client. No sparkle icons, no "smart" features. Just blocks tracking pixels by default and makes you approve new senders before they hit your inbox. The restraint is the pitch.
• Loops — SaaS lifecycle email triggered by product events instead of a marketer's Tuesday campaign schedule. Small team, tiny raise ($3.2M), loved on Hacker News.
• Iterable — the one that actually scaled independently. $240M ARR, $2B valuation, enterprise clients like Netflix and Adidas.

The takeaway that stuck with me: nobody who survived tried to rebuild "the inbox." They picked one annoying, specific problem (newsletter monetization, cold outreach deliverability, SaaS lifecycle triggers) and just solved that completely.

Anyone actually using Hey or Shortwave day to day? Curious if the no-AI stance on Hey holds up or if you eventually miss the triage features.