SignGuard
Block burner emails before they drain your AI credits
Details
- External ID
- 1247678
- Source
- PH
- Company
- —
- Product
- SignGuard
- Website domain
- producthunt.com
- Launched
- Sept. 12, 2026
- Cohort
- —
- Upvotes
- 2
- Upvotes percentile
- 0.7405388069275176
- Tags
- API, Developer Tools, GitHub, Security
- Fetched at
- Sept. 14, 2026, 1:01 a.m.
- Updated at
- Sept. 14, 2026, 1:01 a.m.
Description
Bots use disposable emails to farm your free tier — burning API credits, SMS costs, and server time. SignGuard scores every signup: disposable domains, typosquats, catch-alls, SMTP checks, domain age. 3 lines of code. Free tier, then $19/mo.
Enrichment
- Theme
- email infrastructure and inbox utilities
- Vertical
- Security
- Function
- Vertical SaaS
- Audience
- Developer
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- email verification for ai api credit fraud
- Manually corrected
- False
Could you build this?
Partial The basic API routing and domain lookup are trivial, but maintaining reliable real-time SMTP handshake checks without IP blacklisting, alongside a dynamically updated threat feed of burner domains, requires ongoing network and reputation infra.
What it would actually take: To build an accurate burner detection service, you need a distributed fleet of clean, warm IP addresses to perform MX/SMTP handshakes (RCPT TO) without getting banned or tarpitted, coupled with automated domain scraping pipelines monitoring registrar feeds for low-cost TLD abuse and WHOIS domain age lookups.
Competitors
Other products that read as similar to this one — 84 launches clear the similarity bar, closest 8 shown.
Attention rank: #19 of 85 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 276 days after the earliest competitor.
- Leadcop · ph · 2026-09-10 · 1 upvotes · similarity 0.46
- TempMailer · ph · 2026-09-12 · 1 upvotes · similarity 0.44
- ContractGuard · ph · 2026-09-15 · 2 upvotes · similarity 0.44
- Bluey Email - AI Email Marketing · ph · 2026-09-14 · 21 upvotes · similarity 0.40
- Reloop Temp Email Checker · ph · 2026-09-24 · 11 upvotes · similarity 0.40
- Professional email for $1/month · ph · 2026-09-24 · 2 upvotes · similarity 0.40
- EasyAiWrapper.com · ph · 2026-09-14 · 1 upvotes · similarity 0.39
- Free Email Warmup System · ph · 2026-09-06 · 2 upvotes · similarity 0.38
Other launches for this product
Same idea, different domain
Nobody's really built a vertical saas tool for Insurance yet.