Comparison
AsOf compared with Crunchbase, PitchBook, CB Insights and SEC EDGAR
The short answer
Use a private-market database when the question is about deals: who invested in a round, what a fund holds, which startups are in a market. PitchBook describes data on more than 12.7 million companies and 3.1 million deals, and CB Insights on 13 million company and investor profiles. AsOf does not track funds, investors' portfolios or cap tables, and it covers far fewer companies.
Use AsOf when the question has a date in it: who was the CEO on a given day, what revenue had been reported by then, what changed at a company since last quarter, which AI model was the latest at the time. Each answer is a claim with the day it took effect, the day it ended if it has, and the sources that state it.
Use SEC EDGAR when you need the filing itself. AsOf reads EDGAR for the figures and officer changes of the companies that file there and links each claim to its filing.
Side by side
| Source | What it covers | A value on a past date | Source for each fact | Access | Reuse |
|---|---|---|---|---|---|
| AsOf | Tech and AI companies and a set of other public companies, the people who run them, their products and AI models | Yes: every claim has a start date and, once replaced, an end date; any day can be asked for | Every claim links the sources that state it | Free without a key during the preview: web pages, REST API and MCP server | Facts are free to use; AsOf's own text is CC BY 4.0 |
| Crunchbase | Company profiles, funding rounds, people, investors and acquisitions, worldwide | Funding rounds and acquisitions are dated; no lookup of a profile value on a past date is documented | Says its data comes from venture partners, contributors, filings, news and analysts; a link per fact is not documented | Free account and paid plans; the API is paid and for approved developers | Proprietary: its data terms bar republishing |
| PitchBook | Private and public companies, deals, investors and funds | Deal histories; no lookup of a profile value on a past date is documented | Says its research is based on public and self-reported data; a link per fact is not documented | Subscription with a login PitchBook issues; the API is a separate contract | Proprietary: internal business use |
| CB Insights | Company and investor profiles, financial transactions and public company financials | Funding history, cap table history where available, two years of headcount and trended financials; no lookup of a profile value on a past date is documented | Describes its data as source-verified; a link per fact is not documented | Subscription by seat; MCP, API and data feeds priced by use; no prices listed | Proprietary: internal business use, with limited attributed excerpts |
| SEC EDGAR | The filings of companies that file with the SEC, from the mid-1990s | Yes, filing by filing: each is dated, and figures tagged in XBRL run from 2009 | The filing is the source | Free, with no API key; at most 10 requests a second | Public information that may be copied; the SEC asks to be cited |
| Wikidata | A general knowledge base of more than 120 million items | Only where editors added a start time, end time or point in time to a statement | References are expected for most statements and not required for each | Free: query service and API | CC0 |
| Wayback Machine | Archived copies of public web pages | Shows what a page said on the day it was captured; it holds no structured values | The capture is the source | Free | The archived pages keep their owners' copyright |
"Not documented" means the provider's public pages did not say it on the day they were checked. A paid product may do more than its public pages describe.
When to use which
- Who invested in a funding round, what a fund holds, or which startups are in a market: Crunchbase, PitchBook or CB Insights.
- A private company with no public filings and no official announcements: Crunchbase, PitchBook or CB Insights. AsOf holds only what a source states and it has checked.
- The exact text of an annual report or an officer-change notice: SEC EDGAR.
- Who held a role, or what a figure was, on a given day, with the source: AsOf, or EDGAR read filing by filing.
- What changed at a company between two dates: AsOf.
- What could have been known on a day, counting only what had been published by then: AsOf, or EDGAR by filing date.
- What a company's own website said on a day: the Wayback Machine.
- Which AI model was a lab's latest on a given day: AsOf.
What AsOf does not do
- It does not cover companies in general. The record follows tech and AI companies and a set of other public companies that file with the SEC.
- It holds no investor portfolios, fund data, cap tables or market maps.
- It publishes no estimates. A private company's revenue or valuation is on the record only when a source states it.
- It does not predict anything: no forecasts and no rankings of companies.
- It started in 2026. Earlier dates are answered from filings, archives and dated sources, not from its own observation at the time.
Inside AI assistants
Crunchbase, PitchBook and CB Insights each offer a Model Context Protocol server or connector so an AI assistant can read their data. PitchBook's connector for Claude needs a PitchBook licence, and CB Insights includes MCP access with a seat. Wikidata also runs an MCP server.
AsOf's connector for Claude needs no account during the preview. Every tool only reads the record, and every row comes with a sentence to cite it by.
Questions
Is AsOf an alternative to Crunchbase or PitchBook?
Only for part of what they do. For dated, sourced facts about tech and AI companies (leadership, reported figures, headquarters, releases and what changed), AsOf answers for any day and is free. For deals, investors, funds and broad private-company coverage, Crunchbase and PitchBook cover far more.
What does AsOf have that a company profile does not?
Time. A profile shows the current value. An AsOf claim has the day the value took effect and the day it ended, and the replaced value is kept, so the record answers who the CEO was or what revenue had been reported on any past day.
Where does AsOf get its data?
From SEC EDGAR filings, companies' own official feeds and announcements, Wikidata statements that cite a reference, and model repositories. Only claims that have been checked against a source are published, and each links its sources.
Is AsOf free?
During the preview the web pages, the REST API and the MCP server answer without a key, within a rate limit per address. Pricing and usage terms are being finalised.