MillionVerifier
Keep your email lists clean
What is MillionVerifier
MillionVerifier checks email addresses against validity, disposability, and activity status — processing uploaded TXT, CSV, or XLSX files in bulk or verifying addresses one at a time via API at the moment of capture. It's built for marketing teams, RevOps, and SDR/BDR functions at mid-market and enterprise companies that need to keep bounce rates down across large contact databases. The standout capability is EverClean, an automated list-cleaning service that continuously monitors and re-verifies lists without manual intervention — useful for teams whose databases decay over time. White-labeling support also makes it a fit for agencies or resellers who want to offer verification under their own brand. Where it falls short: native integrations are thin, with only GetResponse mentioned publicly, so teams running HubSpot, Salesforce, or other CRMs will need to wire things up through the API themselves.
Key features
validates whether an address is deliverable
event-driven integrations
Vanderbuild take
For Marketing, RevOps, and SDR/BDR teams that live and die by deliverability, MillionVerifier is a focused, no-frills email verification tool that does one thing and does it consistently at volume. The REST API is available and well-documented enough that you can wrap it into your own MCP layer or agentic enrichment pipeline without much friction — it's rated Capable on agentic readiness, so expect clean integration work rather than out-of-the-box agent support. Pricing is usage-based and scales to enterprise volumes, but the EverClean automated tier requires a sales conversation, so budget for procurement involvement if that's the feature you actually need. The honest limitation here is integration depth — if you're expecting native CRM connectors, you'll be disappointed; GetResponse is the only named integration, and everything else runs through the API or manual file uploads.
Agentic stack profile
APIRESTProgrammatic access available.
REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.
API docs →Agentic readinessCapableSolid API access — wraps cleanly for agent use.
Solid REST or SDK access. No MCP server yet, but easy to wrap in custom agent tooling. Most modern SaaS tools land here.
Stack roleVerifierWhere this tool slots into an agentic pipeline.
Plays the role of Verifier in an agentic pipeline. Use it to validate emails or phones before an agent sends or dials.
MillionVerifier alternatives
Tools that solve a similar problem — compared at a glance.
- Pricing
- Custom
- Budget
- $$$$
- Best for
- Marketing, RevOps
- Readiness
- Capable
- API
- REST
- Pricing
- Custom
- Budget
- $$$$
- Best for
- RevOps, Marketing
- Readiness
- Capable
- API
- REST
- Pricing
- Custom
- Budget
- $$$$
- Best for
- SDR / BDR, RevOps
- Readiness
- Capable
- API
- REST
Frequently asked questions
Does MillionVerifier have a public API?
Yes — MillionVerifier ships a REST API. Docs: https://developer.millionverifier.com/.
How much does MillionVerifier cost?
MillionVerifier: pricing is custom, expect enterprise tier ($$$$) spend. Full pricing page: https://www.millionverifier.com/why-millionverifier/best-email-verification-prices.
Who is MillionVerifier best for?
MillionVerifier is built for Marketing, RevOps, SDR / BDR. Fits Enterprise, Mid-market (50-500)-sized teams.
How well does MillionVerifier fit an agentic sales stack?
Tier: Capable. Solid public API, no MCP yet — straightforward to wrap in your own agent tooling.