On Launch Llama
uChecker - Bulk Email Validation with Full SMTP Data
For email marketers: uChecker validates up to 9 million addresses per job and keeps full SMTP replies so you know exactly why each bounces.
Built by Mark Aurelius
Developer Tools SaaS Freemium
Visit website → Upvotes · 2
In category: #1242 of 1291 · Developer ToolsTrending this week: #1125 of 1291 · Developer Tools
uChecker is a Community listing on Launch Llama with 2 total upvotes across 2 founder supporters, founded by Mark Aurelius who joined in Aug 2026, compared against 6 alternatives.
Community listing
Listing status
2upvotes
Community score
Mark Aurelius (Joined Aug 2026)
Founder
Compared against 6 alternatives
Market comparison
About
uChecker takes a list you already have and tells you which addresses still accept mail. Upload .txt or .csv, up to 9 million in one job, about 3200 a minute, no pre-clean. Results Good, Bad and Risk. Unknown never counts as valid. Full SMTP reply kept. app.uchecker.net, api.uchecker.net/docs, @uchecker_bot, https://uchecker.net/mcp. Thirteen DNS tools free at https://uchecker.net/tools.
Ask AI
ChatGPT Claude Perplexity Grok
For agents
llms.txt · llms-full.txt · ai.txt · Live fact sheet · Full catalog (.md) · Endpoint index · API spec · REST access · Agent server · Server manifest · Server discovery
Pricing
uChecker offers a free plan plus paid tiers. See the website for current pricing.
FAQ
What is uChecker?
uChecker takes a list you already have and tells you which addresses still accept mail. Upload .txt or .csv, up to 9 million in one job, about 3200 a minute, no pre-clean. Results Good, Bad and Risk. Unknown never counts as valid. Full SMTP reply kept. app.uchecker.net, api.uchecker.net/docs, @uchecker_bot, https://uchecker.net/mcp. Thirteen DNS tools free at https://uchecker.net/tools.
How much does uChecker cost?
uChecker offers a free plan plus paid tiers. See the website for current pricing. You can discover and review uChecker for free on Launch Llama.
What category does uChecker belong to?
uChecker is listed under Developer Tools, SaaS on Launch Llama.
How do I get started with uChecker?
Click the "Visit Website" button on this page to go directly to uChecker. You can also upvote and leave a review to help other founders discover it.
Supporters
2 founders2 founders contributed 2 upvotes to uChecker on Launch Llama.
Reviews
1 comment
Hey, love seeing this here! 👋 What inspired you to build this? Would love to hear the story behind it.
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