Clearbit
Acquired9 known investors
Clearbit is a B2B data provider that gathers public web data, proprietary data, and LLMs to produce standardized data sets for enriching records, scoring and routing leads, and revealing website visitor buying intent. It serves B2B go-to-market teams and is now part of HubSpot.
Also known as Clearbit by HubSpot · Clearbit Forms
Investors · 9
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Also in the syndicate · 3
Company profile
researched Aug 2026Clearbit is a business-to-business data provider whose products enrich and standardize information about leads, contacts and accounts for go-to-market teams. The company aggregates public web data, its own proprietary data and large language models to convert unstructured information into structured, standardized attributes, and states that it combines more than 250 public and private data sources including social profiles, company websites, legal filings and crowdsourcing.
The product set spans record enrichment with global coverage across countries and languages; real-time lead scoring and routing supported by granular industry classification (6-digit NAICS, GICS and SIC), corporate-hierarchy data linking parent companies and subsidiaries, and normalized role and seniority fields; buyer-intent detection that converts anonymous website traffic into company-level signals using IP intelligence, surfaced through a visitor dashboard filtered to a customer's ideal customer profile; and dynamic form shortening that removes form fields Clearbit can infer from an email address. Data is delivered through APIs and through integrations with HubSpot, Salesforce, Marketo, Pardot, Google Analytics and other partner platforms, alongside an advertising audiences product.
Clearbit describes a four-stage verification process for each record — recency of refresh within 30 days, agreement across sources, anomaly checks and human review by a trained research team — and says it rebuilds every record every 30 days. Reported dataset scale includes 89M company records, 462M contact records and 4.5B mapped IPs, with 55+ company attributes and 40+ person attributes and 94% email deliverability. Clearbit is now part of HubSpot.
Founding story
Alex MacCaw, a London-born high school dropout who worked as a developer at Twitter and Stripe, encountered repeated friction with inconsistent APIs and the manual work of cleaning and reformatting demographic data. Inspired by Stripe's developer-centric distribution model, he set out to build a unified, reliable API for enriching records from an email address and deliberately chose a problem broad enough to draw feedback from multiple industries. The initial prototype took about three months to build, and feedback from early San Francisco beta users pushed the team toward better data quality and more attributes.
Business model
Clearbit sells access to a continuously refreshed B2B dataset covering companies, contacts and IP addresses, delivered through APIs and through integrations with go-to-market systems such as HubSpot, Salesforce, Marketo, Pardot and Google Analytics. Customers use it to enrich CRM and marketing-automation records, score and route leads, shorten web forms, identify anonymous website visitors and build advertising audiences. The company historically also distributed free developer-facing tools (a Logo API, Clearbit Connect for Gmail, a TAM calculator, a Slack integration and a weekly visitor report) that acted as an on-ramp to paid products; these were retired in 2025 following the HubSpot acquisition.
Subscription and credit-based access to data products and APIs, with usage measured in enrichment credits; a free tier and free tools existed historically but were discontinued in 2025. One secondary source reports the company was profitable at approximately $38M ARR ($3.17M monthly revenue).
Traction
Reported dataset scale of 89M company records, 462M contact records and 4.5B mapped IPs, with 94% email deliverability. A secondary source reports approximately $38M ARR, $3.17M monthly revenue and profitability. Clearbit's own page lists revenue of $10M-$50M and 51-250 employees. Free tools such as the Gmail and Salesforce extensions were reported to have driven hundreds of thousands of installs.
Latest developments
Following HubSpot's acquisition, Clearbit's free offerings were wound down: the free Clearbit Platform, Weekly Visitor Report, Clearbit Connect, TAM Calculator and free Slack integration were discontinued on April 30, 2025, and the free Logo API was sunset in December 2025 after a planned 24-hour outage on November 12, 2025 and the Autocomplete API logo field returning null from September 9, 2025. Customers were directed to authenticated Company Enrichment and Name-to-Domain APIs for logo data, or to third parties such as Logo.dev. Clearbit functionality is being consolidated into HubSpot's Breeze Intelligence, unveiled at INBOUND 2024. Product changelog entries through 2024 detail fixes to HubSpot and Salesforce enrichment connectors, Audience processing and visitor-page filters.
▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies
Market position
Clearbit describes itself as a leading B2B data provider and, on its own materials, as an industry leader in data quality; customer quotes cite use at Intercom, Flexport and Uber. It is now part of HubSpot, which the company site characterizes as a B2B customer platform. Independent market-share or ranking evidence is not present in the sources.
Clearbit positions its differentiation on data quality and breadth: aggregation and dynamic weighting of 250+ sources with per-attribute source selection, a full dataset rebuild every 30 days, a four-stage verification process combining machine learning with a 2,500-person flexible QA team and a 170,000-member community, and highly granular classification (6-digit NAICS, GICS, SIC), corporate hierarchies and normalized role/seniority fields. It also cites IP intelligence for de-anonymizing website traffic into company-level intent signals.
Technology
Clearbit ingests billions of data points daily from 250+ public and private sources and applies large language models to convert unstructured information into standardized attributes. Sources are dynamically weighted and scored in real time so that the best source is selected per attribute. Machine learning plus human review underpin a four-stage verification pipeline, and the full dataset is rebuilt every 30 days. IP intelligence maps 4.5B IPs to companies for visitor de-anonymization and intent scoring. Delivery is via REST APIs (Company Enrichment, Name to Domain, Autocomplete, formerly Logo) and native platform integrations.
Go-to-market
Early growth came from MacCaw's personal network and word of mouth among San Francisco engineers and entrepreneurs, amplified by his roughly 15,000 Twitter followers. Clearbit ran Facebook advertising using custom audiences built from its own data to reach B2B decision-makers, and distributed free tools — notably Gmail and Salesforce Chrome extensions — that drove hundreds of thousands of installs and served as an entry point to paid products. It also used a free Logo API that required a backlink to Clearbit's site as an SEO strategy to build high-quality backlinks. Distribution today also runs through integrations with major marketing and CRM platforms.
B2B go-to-market teams — marketing, sales and revenue operations — at companies using CRM and marketing automation platforms such as HubSpot, Salesforce, Marketo and Pardot; originally developers seeking a unified enrichment API. Named users cited on Clearbit's site include Intercom, Flexport and Uber.
Geography
Clearbit lists San Francisco, CA and New York, NY locations on its own data page, and states global data coverage across every country and in any language. Its founder built the company in San Francisco.
History
Clearbit was started in 2014 by Alex MacCaw, who built the first data-enrichment API prototype in roughly three months and iterated on it with early beta users in San Francisco. It raised $17M from investors including First Round Capital, Battery Ventures, Bedrock (Geoff Lewis), Zetta Venture Partners (Ash Fontana), SV Angel and angels such as Ilya Sukhar, Naval Ravikant, Josh Buckley, Eoghan McCabe (Intercom) and Dharmesh Shah (HubSpot). MacCaw led the company as CEO through at least 2019; a later company page lists Matt Sornson as CEO. Clearbit reported reaching roughly $38M ARR and being profitable before being acquired by HubSpot. After the acquisition, free tools were discontinued on April 30, 2025 and the public Logo API was sunset in December 2025, while Clearbit capabilities were folded into HubSpot's Breeze Intelligence product.
Risks & controversies
The sources note customer-affecting disruptions rather than controversies: discontinuation of free tools and the widely embedded public Logo API required downstream users to migrate, with a deliberate 24-hour outage used to prompt migration; customers upgrading from the free tier to Clearbit by HubSpot experienced incorrectly consumed enrichment credits; and mass Salesforce token resets disconnected some connectors. Broader risk exposure to data-sourcing and accuracy is inherent to the model but not discussed in the sources.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 4
launches, deals, and filingsThe public Clearbit Logo API (logo.clearbit.com) was sunset. The date was initially announced as December 1, 2025 and later stated as December 8, 2025; a planned 24-hour outage took place on November 12, 2025, and the logo field in the Autocomplete API began returning null on September 9, 2025.
The free Clearbit Platform, Weekly Visitor Report, Clearbit Connect, TAM Calculator, and free Slack integration were discontinued on April 30, 2025, with support for free tools ending after that date.
Clearbit joined HubSpot; company site states 'Clearbit has joined HubSpot' and Clearbit's changelog references 'HubSpot's acquisition of Clearbit' and the integration of Clearbit capabilities into HubSpot's Breeze Intelligence.
HubSpot unveiled Breeze Intelligence at INBOUND 2024, offering data enrichment, form shortening and buyer intent features similar to Clearbit's free tools.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- Clearbitclearbit.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Clearbit do?
- Clearbit is a B2B data provider for enrichment, lead scoring and buyer-intent signals, now part of HubSpot.
- Who are Clearbit's investors?
- Clearbit's investors include Cross Creek Advisors, Felicis Ventures, Oyster Ventures, Todd and Rahul’s Angel Fund, Fuel Capital, Zetta Venture Partners.