The short answer

The best fundamental and filings data API in 2026 is the one whose pricing model fits your budget and whose coverage fits your universe. Financial Modeling Prep leads on free-tier headroom (250 requests/day), EODHD's EOD All-World (EUR 19.99/month) is the global-breadth play, Alpha Vantage publishes the cleanest premium ladder, and Intrinio sells institutional feeds a la carte. Figures verified 2026-05-25.

The best fundamental and filings data API in 2026 is the one whose pricing model matches your budget and whose coverage matches your universe, and those two split the field cleanly. For a fundamentals-first build that wants statements, filings, and earnings-call transcripts at a low entry cost, Financial Modeling Prep leads on free-tier headroom (250 requests/day). For deep global end-of-day plus fundamentals in one feed, EODHD's EOD All-World (€19.99/month) is the breadth play. For transparent, rate-tiered premium pricing on price and indicator data, Alpha Vantage publishes the cleanest ladder. And when you need a specific institutional feed (synthetic options without OPRA, index constituents, curated fundamentals), Intrinio sells it à la carte at institutional prices. Every number below comes from the detailed head-to-head pages linked in each section, each verified against the vendor's pricing page on 2026-05-25. Model the annualized cost for your universe in the Data Vendor TCO.

How to read this roundup

This is a synthesis page; it introduces no new pricing numbers. Each pick links to the detailed comparison that holds the verified figures and source links, and to the Data Vendor TCO calculator so you can put a dollar figure on a vendor's published rate for your own scenario. Follow the spoke links for the raw tables; stay here for the decision.

The fundamentals-and-filings field separates along two axes:

  • Pricing model: retail self-serve (FMP, EODHD, Alpha Vantage, Marketstack) versus institutional per-product (Intrinio).
  • Coverage shape: US-centric fundamentals depth (FMP) versus deep global end-of-day (EODHD) versus broad indicators with crypto and FX (Alpha Vantage).

Pick the vendor whose model and coverage line up with your build, not the one with the lowest headline number.

Best free tier for fundamentals: Financial Modeling Prep

For evaluating a fundamentals-first API before paying, Financial Modeling Prep's free tier allows 250 requests/day, an order of magnitude more daily volume than Alpha Vantage's free key (25 requests/day, 5/minute). FMP also leans fundamentals-first by design: financial statements, filings, earnings-call transcripts, and corporate calendars are core, with price data secondary. That makes it the natural starting point for an agent that reasons over filings. One honesty note carried from the detailed page: FMP's exact premium plan prices are not consistently documented across accessible public sources, so confirm current plan prices on its official pricing page before budgeting. The full free-tier and premium comparison is in Financial Modeling Prep vs Alpha Vantage 2026.

Best for deep global end-of-day plus fundamentals: EODHD

If your universe is global rather than US-only and you want end-of-day history plus fundamentals in one feed, EODHD is the breadth play. Its EOD All-World plan is €19.99/month covering 150,000+ tickers worldwide with 30+ years of history, and it sells a separate Fundamentals feed (€59.99/month) and an All-In-One bundle (€99.99/month). The contrast with Marketstack's simpler monthly-quota billing, and where each one wins, is in EODHD vs Marketstack 2026.

Best transparent premium pricing: Alpha Vantage

When you want a published, rate-tiered premium ladder you can budget against without a sales call, Alpha Vantage is the clearest: it lists premium plans from $49.99/month (75 requests/minute) up to $249.99/month (1,200 requests/minute), all with no daily limit, and spans equities, forex, crypto, and a large indicator library. The free key's 25-requests/day cap is the practical constraint, not coverage. How it compares to another budget multi-asset vendor on per-minute headroom is in Alpha Vantage vs Twelve Data 2026; how it compares on fundamentals depth is in Financial Modeling Prep vs Alpha Vantage 2026.

Best for a specific institutional feed: Intrinio

If your requirement is one named institutional data product, with the licensing and support to match, buying it directly beats forcing a retail subscription to fit. Intrinio sells per-product feeds Polygon and the budget vendors do not package as a retail tier: synthetic options pricing without OPRA exchange-agreement complexity, index constituents with display rights, streaming real-time options with Greeks, and curated fundamentals, priced from $600/month per product up to $2,500/month for real-time options. It is institution-priced and sales-assisted, not a budget pick. The full retail-versus-institutional contrast, against Polygon.io's (now Massive) flat $199/month retail tier, is in Intrinio vs Polygon.io 2026.

The decision, condensed

  • Fundamentals, filings, transcripts on a budget, with the larger free tier: FMP (250 requests/day, fundamentals-first).
  • Deep global end-of-day plus fundamentals in one feed: EODHD (EOD All-World €19.99/month; Fundamentals €59.99/month).
  • Transparent rate-tiered premium for price and indicator data: Alpha Vantage ($49.99 to $249.99/month by per-minute rate).
  • A specific institutional feed (synthetic options, index constituents, curated fundamentals): Intrinio (per-product, institution-priced).

The recurring trap is comparing headline prices across different billing axes. FMP and Alpha Vantage cap free requests per day; EODHD prices by data scope with a daily call budget; Marketstack meters monthly requests; Intrinio prices per product. Normalize each vendor to your own request pattern and universe, then put a number on it with the calculator below.

Put a number on your workload

The plan tables in the spoke articles are a starting point; your actual cheapest vendor depends on your universe size, resolution, and whether you need fundamentals depth or global breadth. The Data Vendor TCO calculator takes those inputs and returns an annualized cost so you can compare vendors on your own scenario rather than on a headline plan number. Run it before you subscribe.

This is the fundamentals-and-filings entry in the market-data-vendor series. Read alongside:

Sources

This roundup synthesizes the verified figures in its linked spoke articles. Primary vendor sources are cited on those pages:

Editorial independence

AI Fin Hub Research maintains editorial independence across sponsor relationships. Vendor placements in tools and comparators are not altered by sponsor payments. Disclosures at /sponsor-disclosure/.

Frequently asked questions

What is the best fundamentals and filings data API in 2026?
It depends on which axis binds. For a fundamentals-first build on a budget, Financial Modeling Prep leads on free-tier headroom (250 requests/day) with statements, filings, and transcripts as core. For deep global end-of-day plus fundamentals in one feed, EODHD's €19.99/month EOD All-World is the breadth play. Figures are verified in the linked spoke articles (2026-05-25).
Which has the better free tier, FMP or Alpha Vantage?
FMP, by an order of magnitude on daily volume: 250 requests/day against Alpha Vantage's 25 requests/day (5/minute). That headroom lets you evaluate a fundamentals-first build far longer before paying. Alpha Vantage's edge is elsewhere, in its transparent published premium ladder.
When is Intrinio worth its institutional price?
Only when you need a specific named feed the budget vendors do not package, such as synthetic options without OPRA complexity, index constituents with display rights, or streaming real-time options with Greeks. Priced per product from $600 to $2,500/month, it is sales-assisted, not a budget pick. For plain fundamentals, FMP or EODHD is the value path.