GUIDEHOW-TO
What Is a Sales Tech Stack? How to Choose Yours
Stop buying tools on hype. Learn how to choose a sales tech stack that connects - five criteria, a stack health check, and 1,000+ tools compared.
← All tools
About
What is Mailmo
Mailmo finds and verifies B2B email addresses by searching name-and-domain combinations, running deliverability checks, and flagging catch-all addresses before they hit your sender reputation. It's built for SDRs, BDRs, and founders who are doing outbound at small scale and need accurate contact data without paying for a bloated platform. The standout capability is catch-all verification — Mailmo separates risky catch-all addresses from confirmed deliverable ones, which most entry-level finders skip entirely. A Chrome extension lets you pull emails directly from LinkedIn profiles without leaving the browser. Where it stops being a fit: there's no API and no native CRM integrations, so if you need to push data into HubSpot or Salesforce automatically, you'll be doing that manually or via CSV export.
Capabilities
Key features
Email finder
returns verified work emails by name and domain
Also ships
Chrome extension
Our verdict
Vanderbuild take
Mailmo is a no-frills email finder and verifier that makes sense for solo founders and SDRs who need a low-cost way to build a contact list without torching their domain reputation — it's not trying to be a full sales platform, and that focus shows. On the agentic readiness front, there's no API and no MCP server, so you can't drive this from an agent or plug it into an automated workflow without scraping the UI — it's strictly a manual, browser-based tool. Free or near-free, low risk to test — the free tier gives you 50 verified emails a month with no credit card required, which is enough to validate whether the data quality works for your market. The honest limitation is the integration story: with no native connectors and no API, every contact you find has to be exported via CSV and imported elsewhere by hand, which adds friction fast once your volume grows.
Mateusz Sekta
Founder, vanderbuild
Learn more
Our Resources
GUIDEGTMWhat is GTM Engineering?
What is GTM Engineering? The 2026 guide to the role, tools and salary - plus the top 10 GTM Engineers in North America & Europe.
GUIDEHOW-TOHow to implement outbound in SaaS: costs, tools, and benchmarks [2026]
A complete guide to implementing outbound in SaaS costs from $197, proven tools, benchmarks and legal considerations.
The wedge
Agentic stack profile
APINot publicNo public programmatic access.
API
No public API. Not usable from an agent without scraping.
Agentic readinessNoneNot usable from an agent without scraping.
Agentic readiness
No public API. UI-only. Not usable from an agent without scraping, which we don't recommend.
Stack roleData source · VerifierWhere this tool slots into an agentic pipeline.
Stack role
Plays the role of Data source + Verifier in an agentic pipeline. Use it to source contacts, companies, and the raw inputs an agent needs to act; validate emails or phones before an agent sends or dials.
Compare
Mailmo alternatives
Tools that solve a similar problem — compared at a glance.
Mailmo(this tool)
- Pricing
- Freemium
- Budget
- $
- Best for
- SDR / BDR, Founder
- Readiness
- None
- API
- No
FullEnrich
- Pricing
- Usage-based
- Budget
- $
- Best for
- SDR / BDR, GTM Engineer
- Readiness
- Native
- MCP
- Yes
- API
- REST
BetterContact
- Pricing
- Usage-based
- Budget
- $
- Best for
- SDR / BDR, Founder
- Readiness
- Capable
- API
- REST
Answers
Frequently asked questions
Does Mailmo have a public API?
No — there's no publicly documented API as of today. Mailmo is operated through its UI.
How much does Mailmo cost?
Mailmo: pricing is freemium, expect entry tier ($) spend. Full pricing page: https://mailmo.io/pricing.
Who is Mailmo best for?
Mailmo is built for SDR / BDR, Founder. Fits Solo, SMB (1-50)-sized teams.