# Best Financial Data APIs for Medium-Sized Businesses *By [Nathan Calabrese](https://research.g2.com/insights/author/nathan-calabrese)* Products classified in the overall Financial Data APIs category are similar in many regards and help companies of all sizes solve their business problems. However, medium-sized business features, pricing, setup, and installation differ from businesses of other sizes, which is why we match buyers to the right Medium-Sized Business Financial Data APIs to fit their needs. Compare product ratings based on reviews from enterprise users or connect with one of G2's buying advisors to find the right solutions within the Medium-Sized Business Financial Data APIs category. In addition to qualifying for inclusion in the Financial Data APIs category, to qualify for inclusion in the Medium-Sized Business Financial Data APIs category, a product must have at least 10 reviews left by a reviewer from a medium-sized business. ## How Many Financial Data APIs Products Does G2 Track? **Total Products under this Category:** 225 ### Category Stats (Jun 2026) - **Average Rating**: 4.42/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product**: Plaid (+0.43%) - Among all products in this category, Plaid recorded the largest rating increase compared to last month *Last updated: June 26, 2026* ## How Does G2 Rank Financial Data APIs Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 1,400+ Authentic Reviews - 225+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. --- **Sponsored** ### Flinks Flinks is the creator of a powerful no-code platform and financial data APIs that make it easy and efficient for your team to build with financial data. Trusted by millions of individuals accessing financial services at world-class companies, our purpose is to make the struggles of open banking a thing of the past. Flinks at-a-glance: ● Enrichment — Upgrade your data stack to power data-driven use cases with actionable insights Flinks Enrichment is the smart analytics layer on top of your raw retail and business banking data. Whether your data pipeline is coming from Flinks, or you’re BYOD (bringing-your-own-data) from your existing integrations or open-banking providers—extracting actionable, model-ready insights for credit risk analysis, income verification, life event detection or fraud prevention couldn’t be easier. “Flinks Enrichment provides us with the capability to easily aggregate consumer employment and debt servicing data, allowing our team to fully automate the underwriting process.” —Alex Yi, Fincentify ● Connectivity — Power your solutions with the most performing financial data API Consumers want to use your services—let them easily and securely connect their financial accounts and share the data you need. From KYC to transactional data and assets, Flinks Connectivity is the backbone that will power your business and put you ahead of the competition. “With Flinks we’re able to onboard thousands of clients daily in a matter of minutes, making a complex process as simple and frictionless as possible.” —Laura Lampe, Wealthsimple [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1336&secure%5Bdisplayable_resource_id%5D=1336&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=page_category&secure%5Bplacement_resource_ids%5D%5B%5D=1336&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=43004&secure%5Bresource_id%5D=1336&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Ffinancial-data-apis%2Fmid-market&secure%5Btoken%5D=d6edba8154548912e25fd9c76b3c40b467363704d40d3d7448ab69ab931c2cdb&secure%5Burl%5D=https%3A%2F%2Fflinks.com&secure%5Burl_type%5D=company_website) --- ## What Are the Top-Rated Financial Data APIs Products in 2026? ### 1. [Merge Unified](https://www.g2.com/products/merge-unified/reviews) Merge Unified is the leading Unified API for thousands of organizations, including frontier LLMs, Fortune 500 organizations, and other B2B SaaS companies. Merge Unified allows businesses to add hundreds of integrations to their products through a single API. Instead of building and maintaining each integration in-house, your developers can integrate once with Merge and instantly access over 220 integrations across accounting, HRIS, ATS, CRM, file storage, knowledge base, and ticketing categories. Our platform normalizes data and handles authentication, pagination, and rate limiting, eliminating the complexity of managing multiple APIs. Merge handles the entire integration lifecycle, from implementation to maintenance. Our observability features give your customer success team full visibility and control, while our engineering team catches and resolves integration issues before they impact your customers. Thousands of companies trust Merge to accelerate product development, unblock sales, reduce customer churn, and save engineering resources—allowing them to focus on their core product. Merge adheres to industry-standard compliance frameworks including SOC 2 Type II and ISO 27001, and complies with privacy regulations like HIPAA, GDPR, and CCPA. **Average Rating:** 4.7/5.0 **Total Reviews:** 251 **How Do G2 Users Rate Merge Unified?** - **Quality of Support:** 9.7/10 (Category avg: 8.6/10) - **Has the product been a good partner in doing business?:** 9.5/10 (Category avg: 8.7/10) - **Ease of Use:** 9.3/10 (Category avg: 8.8/10) - **Ease of Admin:** 9.5/10 (Category avg: 8.6/10) **Who Is the Company Behind Merge Unified?** - **Seller:** [Merge](https://www.g2.com/sellers/merge) - **Company Website:** https://merge.dev/ - **Year Founded:** 2020 - **HQ Location:** San Francisco, US - **Twitter:** @merge_api (3,254 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/merge-api/ (138 employees on LinkedIn®) **Who Uses This Product?** - **Who Uses This:** Software Engineer, CEO - **Top Industries:** Computer Software, Information Technology and Services - **Company Size:** 60% Small-Business, 30% Mid-Market #### What Are Merge Unified's Pros and Cons? **Pros:** - Customer Support (71 reviews) - Ease of Use (50 reviews) - Integrations (48 reviews) - Integration Capabilities (27 reviews) - Documentation (26 reviews) **Cons:** - Integration Issues (11 reviews) - Expensive (10 reviews) - Poor Documentation (9 reviews) - Data Limitations (6 reviews) - Learning Curve (5 reviews) ### What Do G2 Reviewers Say About Merge Unified? *AI-generated summary from verified user reviews* **Pros:** - Users commend the **exceptional customer support** of Merge Unified, enhancing their integration experience and resolving issues promptly. - Users appreciate the **ease of use** of Merge Unified, making integration and design decisions straightforward and efficient. - Users praise the **easy integration and extensive API documentation** , enhancing their experience with various systems. - Users value the **seamless integration capabilities** of Merge Unified, enhancing their business potential with unified APIs. - Users find the **documentation exceptional** , enabling quick integrations and effective troubleshooting without extra support. **Cons:** - Users face **integration issues** with complex models, requiring additional effort to determine supported integrations, impacting usability. - Users find Merge Unified to be **expensive** , especially as scaling needs increase, impacting overall value. - Users find the **poor documentation** challenging, noting inconsistencies and a need for more detailed guidance. - Users experience **data limitations** with Merge Unified, seeking more flexibility and clearer visibility in data translation. - Users find the **learning curve challenging** , especially for non-technical individuals struggling to navigate advanced features. #### What Are Recent G2 Reviews of Merge Unified? **"[Exceptional Support and Rapid Feature Releases](https://www.g2.com/survey_responses/merge-unified-review-11968048)"** **Rating:** 4.5/5.0 stars *— Bhavik P.* [Read full review](https://www.g2.com/survey_responses/merge-unified-review-11968048) --- **"[Seamlessly consolidates IdP and HRIS platforms](https://www.g2.com/survey_responses/merge-unified-review-12684831)"** **Rating:** 5.0/5.0 stars *— Adam S.* [Read full review](https://www.g2.com/survey_responses/merge-unified-review-12684831) --- #### What Are G2 Users Discussing About Merge Unified? - [What is Merge API used for?](https://www.g2.com/discussions/what-is-merge-api-used-for) - 2 comments ### 2. [Flinks](https://www.g2.com/products/flinks/reviews) Flinks is the creator of a powerful no-code platform and financial data APIs that make it easy and efficient for your team to build with financial data. Trusted by millions of individuals accessing financial services at world-class companies, our purpose is to make the struggles of open banking a thing of the past. Flinks at-a-glance: ● Enrichment — Upgrade your data stack to power data-driven use cases with actionable insights Flinks Enrichment is the smart analytics layer on top of your raw retail and business banking data. Whether your data pipeline is coming from Flinks, or you’re BYOD (bringing-your-own-data) from your existing integrations or open-banking providers—extracting actionable, model-ready insights for credit risk analysis, income verification, life event detection or fraud prevention couldn’t be easier. “Flinks Enrichment provides us with the capability to easily aggregate consumer employment and debt servicing data, allowing our team to fully automate the underwriting process.” —Alex Yi, Fincentify ● Connectivity — Power your solutions with the most performing financial data API Consumers want to use your services—let them easily and securely connect their financial accounts and share the data you need. From KYC to transactional data and assets, Flinks Connectivity is the backbone that will power your business and put you ahead of the competition. “With Flinks we’re able to onboard thousands of clients daily in a matter of minutes, making a complex process as simple and frictionless as possible.” —Laura Lampe, Wealthsimple **Average Rating:** 4.4/5.0 **Total Reviews:** 59 **How Do G2 Users Rate Flinks?** - **Quality of Support:** 8.4/10 (Category avg: 8.6/10) - **Has the product been a good partner in doing business?:** 8.9/10 (Category avg: 8.7/10) - **Ease of Use:** 9.0/10 (Category avg: 8.8/10) - **Ease of Admin:** 8.7/10 (Category avg: 8.6/10) **Who Is the Company Behind Flinks?** - **Seller:** [Flinks](https://www.g2.com/sellers/flinks) - **Year Founded:** 2016 - **HQ Location:** Montreal, Canada - **Twitter:** @FlinksData (808 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/flinkstech/ (95 employees on LinkedIn®) **Who Uses This Product?** - **Top Industries:** Financial Services - **Company Size:** 61% Small-Business, 36% Mid-Market #### What Are Flinks's Pros and Cons? **Pros:** - Carrier Accounts (1 reviews) **Cons:** - Carrier Limitations (1 reviews) ### What Do G2 Reviewers Say About Flinks? *AI-generated summary from verified user reviews* **Pros:** - Users love the **seamless connection** of Carrier Accounts, making it easy to link their banking effortlessly. **Cons:** - Users are frustrated by the **limited support for certain financial institutions** , affecting their overall experience with Flinks. #### What Are Recent G2 Reviews of Flinks? **"[perfect solution and great service](https://www.g2.com/survey_responses/flinks-review-9092548)"** **Rating:** 5.0/5.0 stars *— melissa e.* [Read full review](https://www.g2.com/survey_responses/flinks-review-9092548) --- **"[Flinks Experience](https://www.g2.com/survey_responses/flinks-review-12080655)"** **Rating:** 5.0/5.0 stars *— Mohammed Hareez S.* [Read full review](https://www.g2.com/survey_responses/flinks-review-12080655) --- #### What Are G2 Users Discussing About Flinks? - [What is Flinks used for?](https://www.g2.com/discussions/what-is-flinks-used-for) - 1 comment ### 3. [Excel Price Feed](https://www.g2.com/products/excel-price-feed/reviews) Live financial markets data in your Excel spreadsheet. Excel Price Feed is an Add-in which includes 100+ new Excel formulas for live, historical and fundamental market data. -Markets include stocks, stock indices, stock options, mutual funds, ETFs, forex, commodities and cryptocurrencies. -Real-time data for NYSE and NASDAQ, delayed data for other exchanges (Europe, Asia, Americas and Australia). -Data is sourced from Yahoo Finance, IG Index / IG Markets, Federal Reserve Economic Data (FRED), EODHistoricalData.com & Nasdaq Data Link. -No coding required, simply add the new formulas to your existing spreadsheets and refresh for the latest data. -A comprehensive Technical Analysis Toolkit. **Average Rating:** 4.4/5.0 **Total Reviews:** 37 **How Do G2 Users Rate Excel Price Feed?** - **Quality of Support:** 8.1/10 (Category avg: 8.6/10) - **Has the product been a good partner in doing business?:** 8.3/10 (Category avg: 8.7/10) - **Ease of Use:** 8.6/10 (Category avg: 8.8/10) - **Ease of Admin:** 7.1/10 (Category avg: 8.6/10) **Who Is the Company Behind Excel Price Feed?** - **Seller:** [Coderun Technologies Ltd](https://www.g2.com/sellers/coderun-technologies-ltd) - **Year Founded:** 2015 - **HQ Location:** Brighton, GB - **LinkedIn® Page:** https://www.linkedin.com/company/coderun-technologies-limited/ (2 employees on LinkedIn®) **Who Uses This Product?** - **Company Size:** 63% Small-Business, 29% Mid-Market #### What Are Recent G2 Reviews of Excel Price Feed? **"[Excellent software for anyone doing anything with stocks or crypto](https://www.g2.com/survey_responses/excel-price-feed-review-7116957)"** **Rating:** 5.0/5.0 stars *— january l.* [Read full review](https://www.g2.com/survey_responses/excel-price-feed-review-7116957) --- **"[Live financial market information in Excel. It is possible with Excel Price Feed](https://www.g2.com/survey_responses/excel-price-feed-review-7109989)"** **Rating:** 5.0/5.0 stars *— Sergio A.* [Read full review](https://www.g2.com/survey_responses/excel-price-feed-review-7109989) --- ## What Is Financial Data APIs? [Financial Services Software](https://www.g2.com/categories/financial-services) ## What Software Categories Are Similar to Financial Data APIs? - [Unified APIs Software](https://www.g2.com/categories/unified-apis) --- ## How Do You Choose the Right Financial Data APIs? ### What You Should Know About Financial Data APIs ### What is Financial Data APIs? Financial data APIs have become an important part of the financial technology landscape. They link internal data sources and external access to financial data, depending on the type of API and the use case stipulations governing its use. Financial data APIs are helping to fuel the development of financial products as well as streamline operational data-involved processes internally. Key Benefits of Financial Data APIs - Improve internal data access - Catalyze external fintech product development - Fuel internal product development ### Why Use Financial Data APIs? Financial data APIs are useful for a variety of reasons. They can improve internal data sharing and operational efficiency, provide an additional source of revenue by charging for external use by partners, and fuel fintech development. Depending on the parameters set regarding developer use of the API in question, the financial institution may benefit handsomely from allowing API access to external developers. Internal developers with API access can provide the institution with new product offerings as well as insights that may inform product development and organizational strategy. **Internal Data Sharing —** One of the primary reasons to use financial data APIs is for internal sharing of financial data. In a large financial institution, data can become very siloed and difficult to access for those not working directly with it on a daily basis. Financial APIs open up access to those data sources, helping to improve transparency and allow easier internal data sharing. **Partner Integrations —** Another reason to use financial data APIs is to strengthen partner integrations with a financial institution. Giving partners access to valuable data sources strengthens the connection between products. **Internal Product Development —** Financial data APIs can help fuel internal product teams’ development processes. They can leverage the data accessed via the API to drive the creation of new products. ### Who Uses Financial Data APIs? Financial services institutions of all shapes and sizes use financial data APIs. **Fintech Companies —** Fintechs make good use of financial data APIs. They are increasingly leveraging access to these valuable data sets to inform product decisions. **Financial Institutions —** Traditional financial companies are using financial data APIs to create products, share data internally, and fuel partner integrations. As the institutions with the largest financial datasets, the opening of those datasets to the world at large (with obvious privacy and data sharing restrictions in place) is key to enhancing the fintech product landscape. ### Kinds of Financial Data APIs There are three types of APIs in the finance industry: internal APIs, private APIs, and open APIs. **Internal APIs —** Internal APIs are used by individuals, usually developers, within an organization. These APIs are designed to share various internal data sources across the organization. The goal of leveraging these APIs is to increase operational efficiency and improve processes by streamlining internal data access. **Private APIs —** Private APIs are limited-use APIs for financial institutions’ business partners to tighten up partner integrations. Financial institutions can monetize the use of these APIs and often leverage their use to enhance security across partnerships. **Open APIs —** Open APIs are used to share financial data with a wide range of potential users. These APIs often limit the amount and type of information that is accessible, and the API creator often vets users prior to granting them access. However, these APIs drive product and application creation by developers who use the data accessed by the API to shape their product. ### Financial Data APIs Features Financial data APIs often include, but are not limited to, the following features: **Data Syncing —** Syncs data across multiple applications. **Live Feed —** Provides live data input from source to application. **Open Interface —** Allows external connections once properly vetted. ### Trends Related to Financial Data APIs The concept of open banking has given way to more discussion of financial data APIs and potential use cases in the financial services world. **Open Banking —** Open banking is the concept of increasing data sharing between financial institutions and fintech companies. This concept, European in origin, has been codified by the Payment Services Directive 2.0 (PSD2) and is designed to increase competition, lower prices, and increase the amount of financial products on the market. Open banking necessitates the creation of public APIs and is fueling their increased use throughout the finance world. **Rise of Fintech —** The rise of technology in financial services has spurred numerous fintech companies to seek out new opportunities to offer financial products for both consumers and businesses. Fintechs are leveraging public APIs to access the data sets of traditional financial institutions and either create new products or connect their products to the fintechs’ own. ### Potential Issues with Financial Data APIs **Security —** Data security is paramount these days. API creators have to ensure there are strong security features built in and that the right data is only accessible to the right people. **Data Sharing Policy —** APIs must navigate the constantly shifting regulatory landscape that governs data sharing. As more personal data than ever before is housed by the various companies we provide with that data, developers have to ensure that the data they are sharing is legally and properly shared. Privacy is a large concern, so financial data APIs must be designed with that in mind. ### Software and Services Related to Financial Data APIs Financial services software is the general umbrella under which financial data APIs fall, and if used properly, they have the capability to impact nearly every subcategory of software that falls within the financial services vertical. [**Investment Portfolio Management Software**](https://www.g2.com/categories/investment-portfolio-management) **—** Investment portfolio management software can leverage APIs to connect to financial data sources for real-time trading-related information. [**Digital Banking Platforms**](https://www.g2.com/categories/digital-banking-platforms) **—** Digital banking platforms can use financial data APIs to strengthen their ability to provide robust product offerings. [**Financial Risk Management Software**](https://www.g2.com/categories/financial-risk-management) **—** Financial risk management software can use financial data APIs to inform risk analysis models.