About 1Lookup
We started 1Lookup to end a quiet tax every business pays: the cost of bad data. Since 2025 we've been building the most accurate, developer-friendly way to validate phone numbers, emails, and IPs, all from a single API.
3-in-1
Phone, Email & IP
<300ms
Avg Response Time
Daily
FCC & Carrier Updates
Millions
Lookups Processed
Stop paying for bad data
Every day, businesses lose real money to bad data: disconnected numbers, fake emails, and fraudulent signups that slip past outdated checks. We think that shouldn't be the cost of doing business.
So we built 1Lookup to make carrier-grade verification simple and affordable: data pulled direct from FCC and carrier sources, sub-300ms responses, and pricing that's just credits you spend as you go. No enterprise contract required.
“They listen, they iterate, and they keep improving. You can feel there are actual engineers behind it, not just salespeople.”
One API for every kind of contact data
Phone, email, IP, and domain intelligence, plus reverse lookups and skip tracing, all sharing a single login and universal credits.
What we stand for
These principles guide everything we do, from the data we source to the way we price.
Accuracy from the source
Our data comes direct from FCC and carrier sources and is refreshed daily, so you act on live records, not stale guesses.
Built for speed and scale
Sub-300ms responses and a bulk API designed to validate millions of records without slowing you down.
Developer-first
One clean API and universal credits, with free tools, clear docs, and integrations for n8n, Make, and AI agents via MCP.
Honest, usage-based pricing
No complex tiers and no hidden fees. Pay only for what you use, and start with a free trial.
From R&D to Real Traffic
From a single validation API to the everything data platform, in a little over a year.
2025
The launch
1Lookup launches as a Momentum Labs product: a single API for real-time phone, email, and IP validation with straightforward, usage-based pricing.
2025
The everything data platform
The suite grows to cover carrier and HLR lookups, spam and risk scoring, reverse lookups, email and IP enrichment, and skip tracing, all under one login.
2026
Built for scale
A bulk API and a new batch pipeline handle CSV uploads in the millions of rows, and international phone validation with non-US spam and risk scoring lands.
2026
Built for developers and agents
A developer hub, free public tools, and integrations for n8n, Make, and AI agents (via a hosted MCP server) make validation easy to wire into any stack.
The team behind 1Lookup
A small, focused team inside Momentum Labs, shipping fast and talking to customers every day.
Robby Frank
Founder
A self-taught entrepreneur who builds B2B SaaS products, Robby founded 1Lookup and co-founded Momentum Labs, the studio behind it. He started 1Lookup to make accurate data verification simple and affordable for everyone, not just big companies.
Momentum Labs
The studio behind 1Lookup
Momentum Labs builds and scales a portfolio of software products. Alongside 1Lookup it builds Emailchaser, a cold email platform, and Batmail, an overnight inbox assistant. Its engineers, QA, and support team keep 1Lookup fast, accurate, and improving week after week.
We're hiring, see open rolesStop paying for bad data
Catch invalid phone numbers, fake emails, and fraudulent signups before they reach your database. Try 1Lookup free for 7 days and cancel anytime.