1Lookup.io is an AI-powered contact discovery platform that helps sales teams, recruiters, and businesses find verified email addresses, phone numbers, and professional contact information. It streamlines lead generation and prospecting, enabling users to connect with the right decision-makers more efficiently.
1Lookup provides an API suite for real-time validation, enrichment and intelligence of emails, phone numbers, IPs and more.
- for
- Developers, sales teams and recruiters needing clean contact data and fraud detection.
- pricing
- freemium · free trial
- license
- open source
works withMCP server integration
Key features
8 features of 1Lookup
- Phone Intelligence — Real-time validation of phone numbers with carrier, porting and risk data.
- Email Validation — Syntax, MX, SMTP and disposable detection to verify email deliverability.
- IP Intelligence — Detect proxies/VPNs, geolocate IPs and assign risk scores.
- Phone Spam Check — Score calls for spam, robocaller detection and reputation tracking.
- Domain Intelligence — Profile domains, detect tech stack and provide security insights.
- Skip Tracing & Enrichment — Reverse lookups and append services for phones, emails, IPs and people.
- Social Suite — Live public data from 13 platforms, including profile checks and video transcripts.
- Audio Transcription — Speech-to-text at 99.9% uptime, billed per minute of audio.
Use cases
- Validate leads in real time to reduce fraud and bounce rates.
- Enrich prospect lists with phone, email and firmographic data for outbound campaigns.
- Monitor incoming calls for spam and block high-risk numbers in call-center applications.
1Lookup pricing
- Starter$99/mo/month20,000 credits · $0.005 per lookup · Email support
- Growth$299/mo/month85,000 credits · $0.0035 per lookup · Priority email & chat support
- Professional$799/mo/month250,000 credits · $0.0032 per lookup · Chat + live meeting support
- Enterprise$1,999/mo/month1,000,000 credits · $0.0020 per lookup · Dedicated CSM
1Lookup vs alternatives
 1Lookup |  Vonage | ||
|---|---|---|---|
| Best for | Unified contact validation and enrichment via universal credits | SMS, voice and verification APIs | Transactional email sending |
| Pricing | Freemium | Subscription | Subscription |
| DevHunt upvotes | 1 | 0 | 0 |
| Launched | Jan 2029 | — | — |
- 1Lookup vs Vonage: Vonage offers verification APIs but focuses on SMS/voice, not the broad data suite of 1Lookup.
- 1Lookup vs Resend: Clearbit (not listed) is similar; among listed tools, SendGrid handles email delivery, not validation.
1Lookup FAQ
Do unused credits roll over?+
Yes, unused credits roll over for up to three months.
Can I change plans anytime?+
You can upgrade or downgrade at any time; changes take effect on the next billing cycle.
Is there a free trial?+
Every plan includes a 7-day free trial with starter credits.
How does pricing work?+
Core validations cost 1 credit each; plans provide a credit pool and a per-lookup price based on volume.
Do you offer volume discounts?+
Custom enterprise plans with volume discounts start at $2,000 / month.
Can I cancel anytime?+
Yes, there are no contracts and you can cancel at any time.
Summarized by DevHunt from 1lookup.io · Oct 15, 2026. Details may change; check the official site.
