
Alpha Vantage
Twelve Data
Polygon.io
Financial Modeling Prep
SiftingIO
FinancialData.net
Finage
Developer-first market data API

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | finfeedapi.com | certdecoder.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United Kingdom · 1 - 9 employees · 2025 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


FinFeedAPI is the simplest and most useful stock & currency exchanges information API for developers building financial applications. Get real-time stock prices, currency exchange information, company financials, and corporate actions through a single, developer-friendly endpoint. Simple...
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing FinFeedAPI and Cert Decoder.
FinFeedAPI's answer
FinFeedAPI is a product developed by the team behind CoinAPI. CoinAPI was founded in 2017 by Artur Pietrzyk, initially stemming from a personal project to build high-frequency market-making models for cryptocurrency markets. Recognizing the broader need for reliable and unified access to exchange data, he launched CoinAPI to provide this infrastructure to others.
FinFeedAPI represents an evolution and expansion of this expertise. It leverages the CoinAPI team's experience in collecting, processing, and delivering complex financial data (initially focused on cryptocurrencies) to offer similar high-quality services for a broader range of traditional financial assets, specifically stocks and fiat currencies, alongside crypto. The aim is to provide a superior, cleaner, and more structured way for users to access this vital financial information.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
FinFeedAPI's answer
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
FinFeedAPI's answer
Our primary audience consists of businesses, developers, and financial professionals who require accurate and timely financial market data to power their applications, strategies, and decision-making processes. This includes:
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
FinFeedAPI's answer
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
FinFeedAPI's answer
While we maintain confidentiality regarding specific client names unless publicly disclosed as partners or in case studies, our target customers mirror the high standards and diverse needs of those served by our sister company, CoinAPI.
The team behind FinFeedAPI has a strong track record, through CoinAPI, of serving a demanding global clientele. This includes:
FinFeedAPI is committed to providing this same caliber of robust data solutions and dedicated support to businesses and developers across the traditional and digital financial markets, from startups to established enterprises. We focus on building long-term partnerships by delivering exceptional data quality and service.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
FinFeedAPI's answer
Share your experience with using FinFeedAPI and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking FinFeedAPI since May 2025.
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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SiftingIO provides real-time and historical market data APIs for stocks, FX, crypto, commodities, DEX, and on-chain markets through REST and WebSocket.
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Stock Market and Financial Data API
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