$39/2,000 credits Free tier MCP API
Why it comes up: Email-only verifier with 100 free checks a month and credit packs from $39, cheaper for small email lists.
Stands out: Validation plus quality scoring on one meter, with a real free 100-credit allowance and a public $99/month subscription.
Watch out: Pay-as-you-go starts at $39 for 2,000 validations if you do not want a subscription. Heavy lists will burn the 10,000-credit ONE cap.
Best for
- Recruiting and sales teams cleaning lists before send
- Ops that want validation as an API
- Desks that need scoring, not only deliverable/undeliverable
4.8 on Capterra from 591 reviews
Read the ZeroBounce write-up · 1Lookup vs ZeroBounce
$9/10k credits Free trial MCP API
Why it comes up: Email verification with 1,000 free credits and paid credits from $9 per 10,000, if you do not need phone checks.
Stands out: Price per check is among the lowest published in the category: $9 for 10,000 and $299 for 1,000,000, against $39 for 10,000 at MillionVerifier, with no subscription and credits that never expire. Only successful verifications use a credit, and an official MCP server lets Claude, Cursor or Codex verify single emails or whole batches from chat.
Watch out: It is a young brand with no Capterra or G2 profile yet, and the accuracy figure on its site is the vendor's own claim, so test it on a list whose bounce rate you already know before cleaning a large one. Purchases are final with no refunds, and the MCP server runs on your own machine through uv rather than as a hosted endpoint, so setup needs a terminal.
Best for
- Recruiters cleaning sourced candidate emails before a cold sequence
- Agencies verifying Apollo, Clay or LinkedIn exports in bulk
- Teams that send in bursts and do not want a monthly verification plan
Read the MailVeri write-up · 1Lookup vs MailVeri
Why it comes up: People and company data API with its own MCP server from $39/mo, if you need enrichment more than validation.
Stands out: Data is fetched from the live profile at the moment you ask rather than from a stored snapshot, and the credit price per call is published endpoint by endpoint, down to 1 credit for a basic person or company profile. The MCP server is unusually complete for a data vendor: 17 tools, OAuth sign in so no key is pasted into the AI app, and every tool states its credit cost before it runs.
Watch out: This is an API, not an app: there is no search interface or sourcing workflow, so someone has to build on it or use it through Clay, n8n or an AI assistant. Rate limits are low on self serve plans (10 to 30 requests a minute), and the richer calls such as post engagement, activity and ICP search pages cost 10 credits each, so a search heavy month burns credits ten times faster than plain enrichment. Emails and phone numbers come back only where they are publicly available, and the vendor does not describe a deliverability check.
Best for
- Recruiting tech teams building sourcing or enrichment into their own product or ATS
- Ops people running Clay or n8n workflows that need current titles, job changes and contact details
- Recruiters who want to query profiles and ICP searches from inside Claude or ChatGPT
Read the Datamagnet write-up · 1Lookup vs Datamagnet
