Sendly Blog

Engineering deep-dives, product updates, and behind-the-scenes from the team building Sendly.

• Building a Sandbox That Actually Helps — 2026-02-04 — Why we built a two-key testing model with magic phone numbers, and how it catches real bugs before they reach production.
• Batch Messaging — Send to Thousands in One Request — 2026-02-03 — How we designed the batch API to handle CSV uploads, per-recipient personalization, and a validation pipeline that catches problems before you spend credits.
• Templates and the Art of Not Repeating Yourself — 2026-02-02 — How verification templates handle variables, presets, and segment calculation — so you write the message once and use it everywhere.
• Hosted Verification — Let Sendly Handle the UI — 2026-02-01 — How we turned 300 lines of phone verification code into a redirect. Create a session, send the user to Sendly, get a validated token back.
• Introducing Teams — Collaborate on SMS at Scale — 2026-01-31 — Manage shared API keys, phone number verification, and billing across your entire organization with Sendly Teams.