Posthorn: is it still online? | SaaS OutpostJune 2026 cohort / Sales and CRM
A CLI lets AI agents configure sending domains, authenticated mailboxes, and inbox warmup for cold email outreach.
- Status
- Onlinesince Nov 5, 2026
Last 30 days
100% of checks answered · median response 1,236 ms
- Oct 8, 2026: Not checked
- Oct 9, 2026: Not checked
- Oct 10, 2026: Not checked
- Oct 11, 2026: Not checked
- Oct 12, 2026: Not checked
- Oct 13, 2026: Not checked
- Oct 14, 2026: Not checked
- Oct 15, 2026: Not checked
- Oct 16, 2026: Not checked
- Oct 17, 2026: Not checked
- Oct 18, 2026: Not checked
- Oct 19, 2026: Not checked
Domain and certificate
- HTTPS certificate
- valid to Jan 6, 2027 · 2 months left
The .sh registry doesn't publish registration data over RDAP, so only the certificate is shown.
History
Launched
· Launch announcement
Online
· online
- Last checked Nov 5, 2026
Similar products, all online at their last check.
OnlineCombines B2B lead discovery, sales outreach, email deliverability, and domain security for sales teams.
OnlineAn AI sales agent that finds prospects, sends personalized emails, and follows up for sales teams.
Oct 8, 2026- Online
- Some checks failed
- Down
- Not checked
Today Daily checks started Nov 5, 2026.
OnlineHelps MSPs find prospects and send branded reports showing their email, website, and SSL security gaps.
Finds and qualifies potential customers and drafts personalized outreach emails for founders, makers, and freelancers.
OnlineAn AI sales agent that manages CRM and inbox relationships by drafting follow-ups in a user's voice for approval.
OnlineRuns B2B email sequences from existing mailboxes and tracks replies for sales teams.