Nexmo Verifies Numbers.1Lookup Delivers Intelligence.
Nexmo pricing includes platform fees plus per-lookup costs for basic validation. 1Lookup delivers specialized validation from one credit balance. As the leading Nexmo alternative for validation, we focus on phone intelligence without the complexity of SMS, voice, and video platform overhead.
Send messages, or validate contacts
Vonage (formerly Nexmo) is a communications platform that also does number lookups. 1Lookup is focused on validating phone, email, and IP.
The 1Lookup approach
- Validate a number and get line type, carrier, DNC status, and a fraud score in one call
- Confirms a line is real and active before you dial or text it
- The same API key also verifies email addresses and looks up IPs
- Phone and carrier data updated daily, from one universal credit balance
- Real-time responses, identical lookups cached for 7 days
- Live in about 5 minutes, with 1,000 requests/min included
The Vonage (Nexmo) approach
- Vonage (formerly Nexmo): SMS, voice, and verification APIs
- Number Insight returns line type and carrier
- A broad communications platform: send messages and calls
- Priced per message and per lookup across many products
- Validation is one piece of a larger CPaaS platform
If you need to send SMS and voice, Vonage is a full communications platform. If your goal is to validate phone, email, and IP data with fraud scoring, 1Lookup focuses on exactly that.
Good tool, no fluff
Been using 1Lookup for a couple months now. We verify leads before pushing them into Pipedrive. Honestly it just works. Not fancy, not buggy, and the support actually answers when you write them. Can't really ask for more.
Brian LetzterUnited States · October 2025The most practical data tool I've used
I've seen hundreds of validation APIs come and go. 1Lookup stands out because they don't oversell. Their data is solid, support is honest, and they're transparent about limitations, which is rare in this industry. I've replaced three tools with this one. They listen, they iterate, and they keep improving. You can feel there are actual engineers behind it, not just salespeople.
Bùi Thị Thanh NgọcVietnam · October 2025Solid phone validation API
We use 1Lookup inside our telemarketing app to verify numbers before they go to the dialer. Setup was simple and the results have been consistent. It's not overloaded with features, just fast, accurate, and reliable. Docs could be a bit deeper, but honestly, it works out of the box.
Dirk van MeerUnited States · December 2025Saved us from hundreds of spam signups
We run a SaaS product with free trials and were getting flooded with bots and fake users. After integrating 1Lookup, the difference was night and day. It quietly filters out junk signups without blocking legitimate customers. The support team even helped us fine-tune our risk thresholds on a quick Zoom call. Being honest, we couldn't ask for more.
Ido ShachamUnited States · January 2026A good addition to our workflow
1Lookup has been a good addition to our workflow over the last few months. We use it to verify IPs, emails, and phone numbers, which has noticeably cut down the time we spend chasing dead-end applications. It's reasonably priced and their support team is actually helpful. It's a very practical tool for what we need.
Meredith Jr. RedmondIsrael · March 2026
Nexmo (Vonage) vs 1Lookup FAQ
Common questions about Nexmo (Vonage) and switching to 1Lookup
What is Nexmo (Vonage)?
Nexmo is the former name of Vonage’s Communications APIs, a cloud communications platform (CPaaS). It provides APIs for SMS, voice, and video, plus two-factor authentication through its Verify API and phone number validation through its Number Insight API. Developers use it to send messages, place calls, and confirm that a phone number is valid and reachable.
How much does Nexmo (Vonage) cost?
Nexmo (Vonage) uses usage-based, pay-as-you-go pricing rather than a flat subscription, so you pay per message, per call minute, or per verification depending on which API you use. There is generally no monthly platform fee for the core APIs, though rented virtual numbers are billed separately. Because each product is priced independently, your total cost depends on the mix of SMS, voice, verification, and number-lookup requests you make each month.
What is the best Nexmo (Vonage) alternative?
The best alternative depends on what you actually need. If you want a full communications platform for sending SMS and placing calls, other CPaaS vendors compete directly; if your goal is data verification rather than messaging, 1Lookup is a strong option because it validates phone numbers, emails, and IP addresses through a single API and one universal credit system. It also offers carrier and HLR lookup, reverse lookup, and fraud and IP intelligence, plus a free trial so you can test it on your own data before switching.
How is 1Lookup different from Nexmo (Vonage)?
Nexmo (Vonage) is a broad communications platform built around sending SMS, voice, and video, with phone validation offered through its Number Insight product. 1Lookup is focused on data verification and unifies phone, email, and IP validation in one API that draws on a single shared credit pool. Its data is refreshed daily from FCC and carrier sources, and it adds carrier/HLR lookup, reverse lookup, and fraud and IP intelligence, so teams that want verification without adopting a full messaging platform can use one vendor and one credit balance.
Can I try 1Lookup for free?
Yes. 1Lookup offers a 7-day free trial so you can validate your own phone numbers, emails, and IP addresses before committing to a plan. This lets you compare coverage and data quality against Nexmo (Vonage) on real records rather than sample inputs.
The Focused Nexmo Alternative
Need validation, not a full communications platform? Choose 1Lookup for specialized validation on one plan.
1Lookup vs Vonage (Nexmo): the same criteria, side by side
Both products measured on identical criteria, with Vonage (Nexmo)’s numbers taken from its own published pricing.
| Criteria |  1Lookup |  Vonage (Nexmo) |
|---|---|---|
| Contact-data coverage | EmailPhoneIP | EmailPhoneIP |
| Pricing model | Monthly plans with universal credits; core phone, email and IP lookups cost 1 credit, enrichment and intelligence products cost more | Pay-as-you-go metering (prepaid by default): Number Insight (Basic, Standard, Advanced tiers) bills per request, with each request's price returned in the API response and, per the help center, queryable via the Pricing API; Verify API V2 charges a fixed platform fee per successful verification plus per-channel fees (SMS, voice/TTS, WhatsApp, email, silent auth) regardless of outcome on the default Conversion model, or destination-based success-only pricing on the enterprise-only Verify Success model (silent-auth attempts with Rejected status are still billed there). |
| Starting price | $99/mo for 20,000 credits ($4.95 per 1,000, down to $2.00 on Enterprise) | Not published; quote-based |
| Free option | Free single lookups via the online tools at 1lookup.io/tools, no account required | None published |
| Free trial | 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise (card required, nothing charged up front) | New accounts start in trial mode with €2 free credit: SMS works only to your registered number plus up to 4 verified test numbers, voice calls only to your registered number, SMS bodies get "[FREE SMS DEMO, TEST MESSAGE]" appended, and trial credit cannot buy phone numbers; restrictions lift when you upgrade to a paid account. |
| Do credits expire? | Unused monthly credits roll over for 3 months; separately purchased credits last 1 year | Not published |
Vonage (Nexmo) fine print worth reading twice
Published terms that change what Vonage (Nexmo) costs or what you can do with it. Each one links to the Vonage (Nexmo) page it was read on, because a claim about somebody else’s contract should be checkable in one click.
Vonage will sunset the Number Insight API effective February 4, 2027 and directs users to migrate to the Vonage Identity Insights API.
Read it on Vonage (Nexmo)’s siteValidity, reachability, roaming status and roaming carrier & country are marked 'Only available in certain markets' and the page says to test and/or contact sales for more information. Porting information is an Advanced-tier feature and is not marked with that caveat.
Read it on Vonage (Nexmo)’s siteCNAM caller-identity data is labelled '(add-on)' in the feature table and is limited to US numbers.
Read it on Vonage (Nexmo)’s site
Vonage’s API reference
Their public developer documentation, so you can judge the integration before you start one.
1Lookup
Vonage
Where Vonage (Nexmo) wins
- Carrier-network data depth: Number Insight Advanced returns roaming and reachability, and the newer Identity Insights API adds SIM swap, original carrier, and subscriber match, data Vonage advertises as sourced directly from mobile carrier infrastructure
- Verify API pairs number intelligence with actual OTP delivery across SMS, voice, WhatsApp, email, and silent authentication in one workflow
- Conversion-based Verify pricing: the fixed platform fee is charged only on successful verifications (channel fees still apply regardless of outcome on the default model)
- Fair metering on Number Insight: rejected requests and permanent-error responses are not billed, and the price of each request is returned in the API response
- Scale-ready: 30 requests per second default on Number Insight, raisable via account manager or support request, inside a full CPaaS ecosystem with one account across SMS, voice, and verification
Where 1Lookup wins
- Phone, email, and IP validation in one API with one universal credit balance
- Phone data refreshed daily from FCC and carrier sources
- Carrier/HLR lookup, line type, spam score, and reverse lookup included alongside validation
- Self-serve plans with no contracts and 3-month credit rollover
Vonage (Nexmo) pricing and product facts verified against vonage.com as of July 2026. Prices change; always confirm on the vendor’s site. 1Lookup numbers come from the live rate card.
Who this is for
A quick, honest read on which tool fits your use case.
Choose 1Lookup if: you want self-serve phone, email, and IP validation with line type and fraud signals from a single API, without taking on a full communications platform.
Consider Nexmo (Vonage) instead if: you also need to send SMS, place voice calls, or run one-time-passcode verification, since Vonage is a broader communications platform built for that.