Monthly visits
Not availableSource snapshot · 2026-10-241
APIs & Data Processing
1Lookup
Validate phone numbers, email addresses, and IP data through one API
11lookup.ioHomepage preview unavailable
What it does
- Send phone numbers, email addresses, or IP data to the API or dashboard to check validity and risk signals.
- Upload batches and review lookup history, remaining credits, and usage in the dashboard.
Made for
Who will find it useful?
For developers and operations teams validating contact details and detecting risky data.
Top alternatives
Compare pricing, free allowances and features
| Tool | Price | Free allowance | Best for |
|---|---|---|---|
| 11Lookup | From $99/mo | Try the service free for 7 days, then pay USD 99 per month for the entry plan. | Validate phone numbers, email addresses, and IP data through one API |
| SSMSGo | Usage-based from $47.90 | Test with 3 free SMS without a credit card; the first top-up costs USD 47.90 for 1,000 SMS. | Send verification codes and notifications to Brazilian numbers via API |
| RRespira | From $10.07/mo | Maker costs EUR 9 per month, with a separate EUR 71 yearly option; a free allowance for the paid product is not specified. | Connect AI assistants to WordPress and review edits on page copies |
| RRealMarketAPI | From $4.99/mo | See the site for details | Access market prices and OHLC data through REST and WebSocket |
Check the official site for current prices and allowances.
Project analysis
What should you build next?
Real revenue, real competition, and how long it takes one person to ship — with a clear verdict: build, wait, or skip. Learn from the failures as well as the successes.
Sample assessments, not final recommendations. Unknown revenue, traffic and build time are left unestimated.
Monthly revenue · MRR (USD)
$266,189Source snapshot · 2026-10-24Launched
2022-01Source snapshot · 2026-10-24Founders
Not availableSource snapshot · 2026-10-24Is it worth building? Check the evidence
5 = more favorableDemand Estimate
Trends, anchor-relative interest, and growth are unavailable; 4 unique suggestion long tails. Demand is estimated only from suggestion count.
1/5
5/5
Competitive room
Not available
Room beyond free alternatives
Not available
Solo feasibility Estimate
The interface and API wrapper are feasible, but reliable carrier, email, and risk data depend on outside suppliers, making rapid independent replication difficult.
2/5
Acquisition Estimate
Phone validation and email verification API queries can directly reach developers.
4/5
Willingness to pay Estimate
Businesses that depend on valid customer details have a clear reason to pay to reduce invalid contacts and risky data.
5/5
Higher scores indicate more favorable conditions. Development samples, not investment advice.