Simon Willison’s Weblog

Kapow SMS Gateway. Looks like a solid provider for sending and receiving SMS messages, with APIs provided over both e-mail and HTTP in both directions.

Posted 8th December 2008 at 5:05 pm

Recent articles

NVIDIA DGX Spark: great hardware, early days for the ecosystem - 14th October 2025
Claude can write complete Datasette plugins now - 8th October 2025
Vibe engineering - 7th October 2025

kapow 1 mobile 40 sms 4

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe