Loop
SaaS
- Industry
- SaaS
- Size
- 120 employees
- Region
- San Francisco, US
Spam rate
−76%
Open rate
+22%
Bounce rate
−54%
Customer story
How Loop cut spam folder rate from 3.4% to 0.8% in a week
A SendGrid migration that took one afternoon, plus a deliverability audit that uncovered three quietly broken templates.
Challenge
Loop sends 4M product emails a month across signup, billing, and engagement. Their spam-folder rate had been creeping up for six months on SendGrid. Multiple support tickets had failed to find the root cause.
Solution
Migration to Inbox OSS in a single afternoon by swapping hostname and API key — no code changes elsewhere. Our deliverability team ran a free audit during onboarding and surfaced three templates with broken DKIM alignment.
Outcome
Inbox placement went from 92.1% to 99.3% in week one. The deliverability scorecard now lives in the engineering Slack and any new template gets reviewed before launch.
“We migrated from SendGrid in a single afternoon. Our spam-folder rate dropped from 3.4% to 0.8% in the first week.”
Start sending email in under 5 minutes.
Free plan includes 3,000 emails/month forever. No credit card required.