B2B data enrichment API tools in 2026

Your CRM export, filled where it is empty

Bring the accounts you have, from a CSV, Excel, Google Sheets or Airtable, up to 20,000 rows a list. Each row is looked up by its website, a page link or an ID, and SpecStream fills only the cells that are empty: website, phone, owner, email, the tools a site runs, or anything you can describe. Values you imported stay labeled as yours and are never overwritten.

A linked sheet is checked every day for new rows, so enrichment keeps running as the list grows. Send the filled rows back to HubSpot, Salesforce, Pipedrive or Attio, matched to the records already there. More on enrichment.

Account traits no vendor sells, checked on each account's own pages

A vendor's API returns the fields its data model has. SpecStream takes conditions in your own words, such as "sells to hospitals" or "lists SOC 2 on its site", and checks each one against the account's own words and numbers. A row that fails a condition is not delivered and not billed, and get_find_decisions returns each condition's answer with its reason, the value, the source and the time it was read.

A price per row, quoted before anything runs

A row with up to 5 facts costs 5¢, a person's email adds 5¢ and a phone 15¢. A company row with a work email is 10¢, so the $33,500 Vendr reports as the median ZoomInfo contract would pay for 335,000 of those rows. There are no seats and no annual contract, and duplicates and rows you already own are not charged.

Every request gets a quote of the most it can cost, good for 30 minutes. Nothing runs until that maximum is approved, and what the run does not use goes back to your balance. Each API key carries its own limits: total, per run and monthly.

Measured search and records already held

The same key runs the Search API, the most accurate web search API in the world: 97.9 F-score on all 1,000 official SimpleQA Verified questions (978 correct), and 64.0 item F1 and 43.4 row F1 on all 200 official WideSearch tasks. The Extract API scores 0.908 F1 on WCXB. The scores and the method are on the benchmarks page.

Funding rounds, new executives and layoffs are at specstream.ai/signals, and a saved request reruns hourly to yearly, labeling each row changed, unchanged or no longer matching. An unchanged row costs 1¢ to recheck.

FullEnrich

A contact enrichment API that uses credits only when it finds a result: 1 credit for a work email and 10 for a mobile phone, with Pro from $29 a month for 500 credits. SpecStream puts the account and the contact on one row, with any company fact you name, at 10¢ for a row with a work email.

Clay

A table tool that runs other vendors' data in waterfalls. Free comes with 100 data credits a month, and Launch is $167 a month. SpecStream returns the finished row from one request, with no provider to choose and no actions to count.

Apollo

A sales database whose API comes on custom plans. People enrichment costs 1 to 9 credits a person, and Vendr reports a median Apollo contract of $19,004 a year. On SpecStream a company row with a work email is 10¢ with no plan to buy, and the row can carry traits Apollo's filters do not list. See Apollo alternatives.