Messari API alternative: 3 of 9 document funding rounds

The short answer on a Messari API alternative for funding data: of the 9 checked here, 3 document a funding-rounds endpoint on a page that loaded for NAUT's fetch on 2 November 2026, NAUT's own API, DropsTab's, and DefiLlama's, whose named /raises endpoint answered HTTP 402 Payment Required rather than data. NAUT tracks 8,659 funding rounds, 368 of them announced in 2026, across 3,337 tracked investors, and this comparison read each tool's own docs or pricing page on that same day.

NAUT published this test and NAUT is one of the 9 tools in it, so the method is written out below and every rival fact in the table comes from that rival's own dated page. A page NAUT could not read is reported as what the fetch returned, never as a fact about the tool, and a tool with no fact that cleared the source check is marked "not tested" rather than scored as a loser. Retest set for 2 December 2026.

How did NAUT pick and check each Messari API alternative?

Criteria were fixed before any page was opened, on 2 November 2026, and all 3 are binary:

1. Does the tool's own public docs or pricing page name an endpoint for funding rounds?
2. Did that page load for a plain fetch from NAUT, with readable text rather than a script shell?
3. Is the price of the plan that carries funding data stated in public on the tool's own page?

The field was the Messari Fundraising API plus 9 tools that a deal maker would reach for next: NAUT, DropsTab, DefiLlama, Crunchbase, Nansen, The Tie, CryptoRank, RootData and PitchBook. That is 10 pages tried in total, and every one of them is counted and named below, including the 3 that returned no usable page to NAUT's fetch.

Criterion 3 cleared for 1 tool. NAUT's own API prices are published and are quoted later in this article. For the rivals, the pricing lines NAUT's recon pulled did not clear the source check that this article requires, and the 1 rival subscription page that was tried directly, defillama.com/subscription, returned HTTP 403 to NAUT's fetch on 2 November 2026. So no rival price appears anywhere here.

Which Messari API alternative documents a funding-rounds endpoint?

3 of the 9 alternatives do, on a page that loaded: NAUT, DropsTab and DefiLlama, the last of those behind a payment wall. The Messari Fundraising API itself also names one, which is why it is the benchmark in the first column rather than a result.

Read the 4 confirmed rows this way. On NAUT, a documented call is GET /v1/investors/{slug}, and its docs say it "returns portfolio data with roundType, amountUsd, announceDate, isLead fields". On DropsTab, the Commercial API page lists a group called "Private and Public Funding Rounds" at the paths /fundingRounds, /fundingRounds/{id} and /fundingRounds/coin/{coinSlug}, alongside investor paths. On DefiLlama, the endpoint is named and live but closed: a plain GET to api.llama.fi/raises returned HTTP 402 Payment Required on 2 November 2026, which is a round-shaped endpoint behind a paid plan rather than a missing one. Those are the 3 crypto funding data API options in this field with a round-shaped endpoint NAUT could name from the tool's own host.

What does the Messari Fundraising API itself document?

Its docs page at docs.messari.io loaded on 2 November 2026 and describes the Fundraising API as an endpoint that "Returns details about fundraising rounds, including amount raised, investors, and project information." That is the shape a funding rounds API has to match, and it is the reason this comparison is scoped to round-level fields rather than to prices, assets or sentiment.

A plain fetch does read Messari's endpoint names and descriptions: the same page lists Get Rounds at /v1/rounds, Get Organizations at /v1/organizations, Get Funds at /v1/funds and Get M&A at /v1/mergers-and-acquisitions. Messari now trades as Blockworks Intel, with messari.io redirecting to app.blockworks.com, and that site's public pricing page excludes Fundraising Data from both the Free and the Pro tier. It states that "Pro provides access to only the Assets endpoints in the API. Contact our sales team to discuss full access to the API and MCP." So there is no self-serve price for the funding-rounds endpoint itself, only a sales conversation, and the retest on 2 December 2026 carries that forward.

The Tie, Nansen, Crunchbase and 3 pages that returned nothing

The Tie is the clearest of the 2 tools scored with no rounds endpoint, because its API page did load. On 2 November 2026 thetie.io/solutions/api was titled "Institutional Crypto Data APIs: Sentiment, News, Token Unlocks & On-Chain" and the products it names are "Sentiment API, News API, Token Unlock API". No fundraising endpoint sits on that page, so The Tie is a different product for a different job, and this test scores it only on the endpoint question.

Nansen is the second scored result. Its Funds API, read on docs.nansen.ai/api/funds on 2 November 2026, tracks the on-chain wallet holdings of crypto funds rather than VC funding rounds: the documented endpoint is /api/v1beta1/funds/holdings, returning "current aggregated token balances and 24-hour changes for Fund wallets". No Nansen endpoint for fundraising rounds, amounts or dates is documented, so Nansen is scored on the endpoint question the same way The Tie is.

Crunchbase served a docs page that loaded. No claim drawn from it cleared the source check before this article closed, so it is not tested here and no statement about its coverage, price or endpoints appears above.

3 pages gave NAUT's fetch nothing usable on 2 November 2026: pitchbook.com returned HTTP 403, and cryptorank.io and rootdata.com returned no readable page. Each of those tools may well document funding rounds. This test cannot say either way, which is what "not tested" means in the table. DefiLlama sits in between: its endpoint answered, but defillama.com/subscription returned HTTP 403, so the price of the plan that opens api.llama.fi/raises could not be read.

Which Messari API alternative returns the rounds behind this article?

NAUT's data shows 8,659 funding rounds on file on 2 November 2026, 368 of them announced in 2026, spread across 3,337 tracked investors. Those are the records a Messari API alternative has to match on volume. Below are the 10 largest rounds by the disclosed amount on NAUT's record, read on 2 November 2026, ranked by that amount.

Announced	Company	Type	Amount
2026-02-27	OpenAI	Funding Round	$110,000M
2026-08-16	OpenRouter	M&A	$7,000M
2024-10-02	OpenAI	Funding Round	$6,600M
2017-06-26	Vaulta	ICO	$4,196.9M
2026-09-08	Mistral AI	Series D	$3,580M
2025-11-13	Cursor	Series D	$2,300M
2026-03-11	Nebius	Strategic	$2,000M
2025-09-09	Mistral AI	Series C	$2,000M
2025-10-09	Reflection AI	Series B	$2,000M
2025-04-11	Safe Superintelligence	Funding Round	$2,000M

2 of these 10 rows carry a named lead investor on NAUT's record, the 2026-03-11 Nebius round and the 2025-10-09 Reflection AI round. A count of leads or backers here is NAUT's record of those rounds, not a claim about who else was in them. 9 of the 10 rows are typed as a raise and 1, the OpenRouter row, is typed M&A, so a reader pulling this through an API gets the round type with the amount and can filter on it.

How much did the largest round per company come to?

8 companies hold these 10 rounds, because OpenAI and Mistral AI each appear twice, and the chart shows each company's largest single round on NAUT's record.

How can a BD team work a funding-rounds API?

• Start from the round, then the company, then the person. NAUT's 8,659 rounds all hang off a company page that lists that company's team.
• Filter on round type before you write anything. The 10 rows above split 9 raises and 1 M&A, and those 2 situations need different openers.
• Pick the API by the field you need to sort on. A round-shaped endpoint gives roundType, amountUsd and announceDate, so a 2026-only or a $100M-plus list is 1 query rather than a manual pass.
• Treat anything marked not tested here as unknown, not as absent. 3 of the 9 tools returned no readable page to NAUT's fetch on 2 November 2026.

Related reading on NAUT: Messari alternatives: 3 tools tested on 113 crypto rounds and Crypto investor API: 474 rounds for 3 funds in 3 calls.

Can you pull this data through the NAUT API?

Yes. The companies in the table above come back from NAUT's developer API as JSON, the same records the pages show: GET https://api.naut.so/v1/projects/openai with an Authorization: Bearer $NAUT_KEY header returns that company with its team for 5 credits. Round-level rows, each with roundType, amountUsd, announceDate and isLead, come from GET https://api.naut.so/v1/investors/{slug} for a fund, at the same 5 credits a call, and a key with no credits gets clearly marked sample data so you can build first. Plans start at $49 a month for 3,000 credits (pricing), and the API docs list every endpoint. Verified Telegram, email and LinkedIn unlock on any paid NAUT plan: start a 7-day trial.

Messari API alternative FAQ

What can replace the Messari API for funding data?

Of the 9 tools NAUT checked on 2 November 2026, 3 document a funding-rounds endpoint on a page that loaded for a plain fetch: NAUT, at GET /v1/investors/{slug} with roundType, amountUsd, announceDate and isLead on each portfolio row, DropsTab, at /fundingRounds with 2 further paths, and DefiLlama, at api.llama.fi/raises, which answered HTTP 402 Payment Required. The other 6 are either a different product, as with The Tie's sentiment, news and token unlock APIs and Nansen's fund wallet holdings, or not tested because no fact from their pages cleared this test's source check.

Which tools were not tested in this Messari API alternative comparison, and why?

4 of the 9 are marked not tested, and none of them is scored as a loser. Crunchbase served a docs page that loaded, but no claim from it cleared the source check. PitchBook's own site returned HTTP 403 to NAUT's fetch on 2 November 2026, and cryptorank.io and rootdata.com returned no readable page. The Tie's API page and Nansen's Funds API docs both loaded in full and name no fundraising endpoint, so both are scored, not skipped. DefiLlama is scored too: its endpoint answered HTTP 402, though its subscription page returned HTTP 403, so its price stays unknown.

How many funding rounds does NAUT hold, and how recent are they?

NAUT's data shows 8,659 funding rounds on file on 2 November 2026, 368 of them announced during 2026, across 3,337 tracked investors. The largest on record is OpenAI at $110,000M, announced 2026-02-27.

Where can I find the companies behind these rounds and their contact channels on NAUT?

Each of the 8 companies in the chart above has a NAUT page that lists its team, from Mistral AI to Safe Superintelligence, and the same records come through the API at GET https://api.naut.so/v1/projects/openai for 5 credits a call. Verified Telegram, email and LinkedIn unlock on any paid NAUT plan: start a 7-day trial.

Sources

• NAUT production database, read-only query on 2 November 2026: 8,659 funding rounds, 368 announced in 2026, 3,337 tracked investors, and the 10 largest rounds by disclosed amount with their types and leads.
• NAUT API docs, read 2 November 2026: naut.so/docs/api/endpoints/data-and-network and naut.so/docs/api/pricing-and-quotas.
• Messari Fundraising API docs, read 2 November 2026: docs.messari.io/api-reference/endpoints/funding/funding-api
• Blockworks Intel pricing page, read 2 November 2026: app.blockworks.com/pricing, for Fundraising Data being excluded from Free and Pro and full API access going through sales.
• DropsTab Commercial API page, read 2 November 2026: dropstab.com/products/commercial-api
• DefiLlama, read 2 November 2026: api.llama.fi/raises returned HTTP 402 Payment Required, and defillama.com/subscription returned HTTP 403, so no DefiLlama price is quoted here.
• The Tie API page, read 2 November 2026: thetie.io/solutions/api
• Nansen Funds API docs, read 2 November 2026: docs.nansen.ai/api/funds
• Loaded on 2 November 2026 and left out of the scoring: data.crunchbase.com/docs, because no fact from it cleared this test's source check.
• Returned nothing usable to NAUT's fetch on 2 November 2026: pitchbook.com (HTTP 403), cryptorank.io and rootdata.com (no readable page).
• No rival price appears in this article: no rival pricing line cleared this test's source check.
• Retest scheduled for 2 December 2026.