1lookupData and validation APIs
From $4.00
per 1,000 certificate checks; $9.90 on Starter
Certificate and TLS data
Cert Spotter Hobbyist at $15 a month (the menu also prints $150 a year): up to 20 endpoints, certificate health checks every hour, port 443 on one IPv4 and one IPv6 address per endpoint, and a 30-day audit log
sslmate.com
Certificate monitoring vs on-request certificate check
SSLMate monitors certificates from $15 a month for up to 20 endpoints, and 1Lookup checks a certificate when you ask for $0.010 a read.
Looking for a SSLMate alternative? This page sets SSLMate pricing beside 1Lookup, with every SSLMate figure taken from its own published pages, checked October 2026.
- 7-day free trial on every plan
- No contract and no minimum volume
2
Credits per certificate read
about $0.01 on Starter
0
Credits when there is no certificate
no HTTPS, no charge
7
Verdicts
from valid to not trusted
30
Days left that flag a renewal
expiring soon at 30 or fewer
At a glance
Here is where 1Lookup wins against SSLMate, and where SSLMate still wins.
These are different jobs. SSLMate's Cert Spotter watches the domains you list, checks them on a schedule and alerts you, including when an unknown certificate is issued for one of them, and its Certificate Search API searches Certificate Transparency logs. 1Lookup reads the certificate a server presents when you send a domain, and returns the verdict and the days left, billed per certificate read.
1lookupWhere 1Lookup wins- An answer when you ask: send a domain from your own code, a form or a CSV and get the verdict, the days left and the dates back in the same response, with no list of endpoints to set up
- A price per certificate read, about $0.010 on Starter, with no endpoint count to size in advance, and a domain with no certificate to read costs nothing
- The status in words with each problem as a sentence, and the key, the TLS version and the cipher the connection used
- The same key and balance also pay for phone, email and IP validation, and credits roll over for 3 months
What it costs
From $4.00
per 1,000 certificate checks; $9.90 on Starter
Where SSLMate wins- Continuous Certificate Transparency monitoring: Cert Spotter 'will alert you immediately about unknown certificates' issued for a monitored domain, which a check run on request does not do.
- Scheduled health checks and alerts: checks for installation problems such as a mismatched hostname or incomplete chain run every hour (Hobbyist), every 15 minutes (Startup) or every 5 minutes (Business), and alerts go by email, webhook or Slack notification.
- Its features page lists expiration monitoring ('Get alerts when certificates haven't been renewed yet'), installation monitoring ('Correct chain, matching hostname, proper OCSP stapling, and more'), browser CT policy compliance monitoring, CAA record monitoring and MTA-STS monitoring.
- Discovery and coverage: certificates and subdomains are found automatically, Startup and Business add DNS provider and domain registrar integrations that find domains to monitor, and Business monitors from 10 worldwide locations.
- The Certificate Search API returns all known, unexpired certificates for a domain name, optionally including all sub-domains, deduplicated across 40+ Certificate Transparency logs, with a revoked flag and an option to fetch only certificates added since the last query.
What it costs
Cert Spotter Hobbyist at $15 a month (the menu also prints $150 a year): up to 20 endpoints, certificate health checks every hour, port 443 on one IPv4 and one IPv6 address per endpoint, and a 30-day audit log
Short answer
SSLMate sells two products: Cert Spotter monitoring, from $15 a month for up to 20 endpoints with a 30-day free trial, and a Certificate Search API over Certificate Transparency logs with a free Small plan. Neither is priced per lookup. 1Lookup's SSL Certificate Check reads a certificate on request for 2 credits, about $0.010 on Starter, and monitors nothing.
What replaces what
Here is which 1Lookup product matches each SSLMate job.
SSLMate prices Cert Spotter by the number of endpoints monitored each month and its Search API by queries an hour. This is the on-request version: one API call per certificate, charged only when a certificate is read.
Side by side
Both products are measured on the same criteria, using SSLMate's own published numbers.
| Criteria | 1lookup | |
|---|---|---|
| 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 | Two separate products, both priced per month with no price per lookup. Cert Spotter monitoring is sold by endpoints (a domain or sub-domain whose certificates are monitored): Hobbyist $15 a month for up to 20 endpoints, Startup $100 a month for up to 150, Business $500 a month for up to 1,000 and Enterprise custom, with a 30-day free trial on each of the three priced plans; the menu prints 'Certificate monitoring from $15/month or $150/year'. The Certificate Search API, which searches Certificate Transparency logs, has its own pricing page: Small $0 a month (100 single-hostname queries an hour), Medium $50 a month (1,000) and Large $500 a month (10,000), with two bigger plans at $1,000 and $1,500 a month. |
| Starting price | $99/mo for 20,000 credits. At 2 credits each (SSL Certificate Check API), that is $9.90 per 1,000 certificate checks on Starter, down to $4.00 on Enterprise. | Cert Spotter Hobbyist at $15 a month (the menu also prints $150 a year): up to 20 endpoints, certificate health checks every hour, port 443 on one IPv4 and one IPv6 address per endpoint, and a 30-day audit log. |
| Free option | Free single lookups via the online tools at 1lookup.io/tools, no account required | Certificate Search API Small plan at $0 a month: 100 single-hostname queries an hour, 10 full-domain queries an hour, 75 queries a minute, 5 queries a second and a 15 second query timeout; the page notes rate limits and timeouts may be reduced during periods of high load. |
| Free trial | 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today | 30 days free on each Cert Spotter plan (a 'Start 30 Day Free Trial' button on Hobbyist, Startup and Business). |
| Do credits expire? | Unused monthly credits roll over for 3 months; separately purchased credits last 1 year | No credits: both products are monthly plans, priced by endpoints monitored or by queries an hour. |
At volume
This is what SSLMate charges at each volume it publishes.
| Volume | Price | Per 1,000 |
|---|---|---|
 1Lookup, every plan | $99 to $1,999 a month | $2.00 to $4.95 |
| Up to 20 endpoints monitored (Cert Spotter Hobbyist) | $15 a month | - |
| Up to 1,000 endpoints monitored (Cert Spotter Business) | $500 a month | - |
| 100 single-hostname Certificate Search API queries an hour (Small) | $0 a month | - |
| 1,000 single-hostname Certificate Search API queries an hour (Medium) | $50 a month | - |
SSLMate figures verified October 2026 against sslmate.com.
How you buy
This is how you buy from 1Lookup and from SSLMate.
1lookupHow it is sold
Monthly plans with universal credits; core phone, email and IP lookups cost 1 credit, enrichment and intelligence products cost more
What it starts at
$99/mo for 20,000 credits
How you try it
7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today
How it is sold
Two separate products, both priced per month with no price per lookup
What it starts at
Cert Spotter Hobbyist at $15 a month (the menu also prints $150 a year): up to 20 endpoints, certificate health checks every hour, port 443 on one IPv4 and one IPv6 address per endpoint, and a 30-day audit log
How you try it
30 days free on each Cert Spotter plan (a 'Start 30 Day Free Trial' button on Hobbyist, Startup and Business)
A real result
This is what one 1Lookup result looks like.
Send a domain
POST a domain, a web address or an email address. An IP address, a single word or a bare public suffix is refused with a clear error and costs nothing.
We read the certificate
1Lookup looks the name up, connects to a public address on port 443, asks for the certificate and closes the connection. Expired, self-signed and wrong-name certificates are read and not refused, and a private or internal address is never connected to.
Get the verdict, flat and structured
The status, the days left, the dates, the issuer, the names and the problems arrive in one JSON payload. A certificate that is read bills 2 credits, and a domain with no certificate to read bills nothing.
One call returns the verdict on a domain's HTTPS certificate
- Domain
- sample-shop.example.com
- Status
- Valid
- Expires
- Nov 30, 2026 (38 days left)
- Issued on
- Sep 1, 2026
- Issued by
- Sample Trust CA 1
- Trusted by browsers
- Yes
- Covers this name
- Yes
- TLS version
- TLSv1.3
- Key
- EC 256, curve prime256v1
200 OK, 2 creditsShowHide
{
"classification": {
"found": true,
"host": "sample-shop.example.com",
"certificate_status": "valid",
"days_remaining": 38,
"valid_to": "2026-11-30",
"issuer": "Sample Trust CA 1",
"hostname_matches": true,
"trusted": true,
"protocol": "TLSv1.3",
"issue_count": 0,
"checked_at": "2026-10-23"
},
"insights": {
"ssl_certificate_result": {
"status": "valid",
"issues": [],
"data_source": "tls_handshake"
}
},
"metadata": { "credits_used": 2 }
}Try the Free SSL Certificate Checker, one of 1Lookup's free tools.
Run one lookup in your browser and see the result before you decide.
The evidence
Here is the evidence behind every number on this page.
Here are SSLMate and 1Lookup side by side on the terms you check before you sign.
The terms that decide what a year actually costs, rather than what the first month does. “Not listed” means we could not verify it on either product’s published pages, not that the answer is nothing.
| Term | 1Lookup | SSLMate |
|---|---|---|
| Minimum commitment | None. Monthly plans with no contract and no minimum volume; cancel any time | Both products are priced per month; the Cert Spotter menu also prints $150 a year as an annual price. |
| API access | Included on every plan and during the free trial; there is no tier that unlocks it | The Certificate Search API is its own product with a free Small plan; an API key goes in the Authorization header as a Bearer token or as the Basic Auth username. The API reference allows a limited number of unauthenticated 'List Issuances for a Domain' queries per hour for personal or evaluation purposes. On Cert Spotter monitoring, webhook notification is on Startup and Business. |
| Rate limit | 200 requests per 10 seconds for each API key on standard lookups and 1,000 requests a minute for each key on number type, HLR and MNP, and each account can make up to 1,000 requests a minute in total across all its keys; higher limits are available on request | Certificate Search API, per plan: Small 100 single-hostname queries an hour and 10 full-domain queries an hour, 75 queries a minute, 5 a second; Medium 1,000 and 100 an hour, 500 a minute, 10 a second; Large 10,000 and 1,000 an hour, 2,000 a minute, 20 a second (the two hourly figures are single-hostname and full-domain queries). |
| Support | Starter: Email Support; Growth: Priority Email & Chat Support; Professional: Chat + Live Meeting; Enterprise: Dedicated CSM | Cert Spotter: 'Faster customer support' on Startup and 'Priority customer support' on Business; Enterprise is arranged by email to enterprise@sslmate.com. |
This is the SSLMate fine print worth reading twice.
Published terms that change what SSLMate costs or what you can do with it. Each one links to the SSLMate page it was read on, because a claim about somebody else’s contract should be checkable in one click.
Certificate Search API add-ons are priced separately: Firehose Access is $1,000 a month and provisioned indexes start at $100 a month per domain.
Read it on SSLMate’s siteFree tier users of the Certificate Search API can have functionality discontinued, altered or restricted at any time without notice, per the API reference.
Read it on SSLMate’s site
1Lookup
SSLMate
SSLMate pricing and product facts verified against sslmate.com as of October 2026. Prices change, so confirm on the vendor’s site. 1Lookup numbers come from the live rate card.
Who it is for
Pick 1Lookup or stay with SSLMate depending on the job in front of you.
1lookupChoose 1Lookup if
you want to check a domain's certificate once, on request, and get days left, issuer, hostname match and trust straight away, paying only for the check.
SSLMateConsider SSLMate instead if
you want to be alerted before a certificate causes an outage: SSLMate Cert Spotter monitors Certificate Transparency logs for unknown certificates, runs health checks hourly or faster, and its Certificate Search API finds every certificate issued for a domain and its sub-domains.
Questions
People ask these questions before they switch from SSLMate.
What is SSLMate used for?
Watching certificates. Cert Spotter 'will alert you immediately about unknown certificates' issued for a monitored domain, runs health checks for installation problems such as a mismatched hostname or an incomplete chain every hour, 15 minutes or 5 minutes depending on the plan, and sends alerts by email, webhook or Slack. Its Certificate Search API returns all known, unexpired certificates for a domain name, deduplicated across 40+ Certificate Transparency logs.
How does SSLMate pricing work?
Two separate products, both priced per month with no price per lookup. Cert Spotter is sold by endpoints: Hobbyist $15 a month for up to 20, Startup $100 a month for up to 150, Business $500 a month for up to 1,000 and Enterprise custom, with a 30-day free trial on each priced plan, and the menu prints 'Certificate monitoring from $15/month or $150/year'. The Certificate Search API is Small $0 a month (100 single-hostname queries an hour), Medium $50 a month (1,000) and Large $500 a month (10,000), with two bigger plans at $1,000 and $1,500 a month. Prices checked October 2026.
How much does 1Lookup charge for the same lookup?
2 credits per certificate read, free when the domain has no certificate to read. On the Starter plan ($99 a month for 20,000 credits) a check is about $0.010, which covers 10,000 certificates a month and is $9.90 per 1,000. At the Enterprise end of the rate card it is about $0.004. SSLMate has no price per lookup, so no per-1,000 figure sets the two side by side. Cert Spotter Hobbyist at $15 a month is the cheaper bill for 20 endpoints watched every hour, and a Starter month buys 10,000 checks that you run yourself.
Is SSLMate a like-for-like alternative to 1Lookup?
No. Cert Spotter watches a list of endpoints continuously and alerts you, while 1Lookup answers when you send a domain. If you need alerts, discovery of certificates you did not know about and a schedule you do not have to write, SSLMate is the product. If you need a certificate read inside your own code, a form or a bulk job, with a verdict and the days left, that is 1Lookup's.
How does the Certificate Search API differ from a certificate check?
It answers from Certificate Transparency logs ('Instantly search Certificate Transparency logs for a domain's SSL certificates') and returns known, unexpired certificates for a domain name, optionally including all sub-domains, with a revoked flag. That is the certificates that were issued and logged. 1Lookup connects to the domain and reads the certificate its server presents when it is asked.
What does Cert Spotter check that 1Lookup does not?
Expiration monitoring ('Get alerts when certificates haven't been renewed yet'), installation monitoring ('Correct chain, matching hostname, proper OCSP stapling, and more'), browser Certificate Transparency policy compliance, CAA record monitoring and MTA-STS monitoring, with automatic discovery of certificates and subdomains, DNS provider and registrar integrations from Startup, and monitoring from 10 worldwide locations on Business. 1Lookup reads one certificate per request from one network, and does not check OCSP stapling, CAA records or MTA-STS.
What are the limits of SSLMate's cheaper plans?
Hobbyist monitors port 443 on one IPv4 and one IPv6 address per endpoint. Unlimited ports and IP addresses per endpoint, webhook notification and the DNS and registrar integrations start at Startup ($100 a month), and monitoring from 10 worldwide locations is on Business ($500 a month). The API reference says SSLMate 'may discontinue, alter, or restrict functionality for free tier users at any time without notice'.
Where does SSLMate beat 1Lookup?
On monitoring and alerts. Cert Spotter watches your domains for you, alerts you about unknown certificates, checks the installation every hour or faster, and starts at $15 a month with a 30-day free trial, and the Certificate Search API has a free Small plan. 1Lookup checks a certificate only when you ask, sends no alerts and charges for each certificate it reads.
What is the best SSLMate alternative?
If you want continuous monitoring and alerts, SSLMate is the better fit and 1Lookup is not an alternative to it. If you want an API that reads a certificate when your code or a user asks, with a verdict and the days left, bulk CSV files and one balance that also pays for phone, email and IP checks, 1Lookup's SSL Certificate Check bills 2 credits only when a certificate is read.
Is SSLMate worth it in 2026?
If you want to be told before a certificate causes an outage, or to find certificates issued for your domains that you did not request, yes. If you only need to read a certificate on demand, compare the endpoints you would watch with a price per certificate read.
1lookupCheck a domain's certificate when you need the answer.
Try 1Lookup free for 7 days and compare it with SSLMate on your own work.
2 credits a certificate read, about $0.010 on Starter, on the same balance as phone, email and IP checks. Start with the 7-day free trial.
Keep going
Keep researching SSLMate with the matching 1Lookup pages.
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