$39/2,000 credits Free tier MCP API
Why it comes up: A long-established verifier with a free 100 a month and paid from $39 for 2,000 credits, plus an API for real-time checks.
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 · DataStreams.ai vs ZeroBounce
Why it comes up: Cheaper at small volumes from $8 per 1,000 credits, with integrations into common sending tools.
Stands out: A long-running list-cleaning API used next to marketing and recruiting outbound, not a finder.
Watch out: Plans start at $49/mo, sold as credit packs. You still need a finder if the list has no addresses yet.
Best for
- Ops cleaning large outbound lists
- Teams that want verification as an API
- Marketing and recruiting desks sharing one cleaner
4.4 on Capterra from 51 reviews
Read the NeverBounce write-up · DataStreams.ai vs NeverBounce
$8/1,000 credits Free trial MCP API
Why it comes up: Also has never-expiring credits, from $8 per 1,000, and adds a real-time API and an official MCP server.
Stands out: Bouncer runs a free MCP server at https://api.usebouncer.com/mcp that connects to Claude or ChatGPT over OAuth 2.1, so a recruiter can paste a CSV into a chat and get a cleaned list back without opening the app. It exposes the same engine as the API, including single checks, batch jobs, domain checks, toxicity lists and a credit balance check, and it costs nothing beyond the credits used.
Watch out: Entry pricing is mid-market rather than cheapest: $8 per 1,000 credits against $6.99 at EmailListVerify, with a 1,000 credit minimum purchase. The pieces people assume are included are separate lines: the Deliverability Kit is a subscription from $25/month and Bouncer Shield is priced by monthly form checks. Verification data is processed in the EU only, which is a plus for GDPR and a question to ask if your policy requires US processing.
Best for
- Recruiters and lead generation teams cleaning cold outreach lists before a send
- Teams with uneven volume that do not want a monthly seat or credit subscription
- Developers who need a documented real-time API on signup forms and sequencers
4.9 on Capterra from 279 reviews
Read the Bouncer write-up · DataStreams.ai vs Bouncer
$9/mo Free tier Free trial API
Why it comes up: A free tier and paid plans from $9/mo for teams that want a low monthly subscription instead of credits.
Stands out: Pay-per-credit bulk verify with a free monthly allowance and an API.
Watch out: It only cleans lists, so you still need a finder to build them.
Best for
- Recruiters cleaning outbound lists before send
- Teams that want pay-per-credit instead of a seat
- API list-cleaning jobs
4.9 on Capterra from 198 reviews
Read the Reoon write-up · DataStreams.ai vs Reoon
