Best Unified APIs
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What are Unified APIs?
Unified APIs are a type of application programming interface (API) that allow companies and organizations to integrate multiple services into one convenient platform. Unified APIs provide developers with a comprehensive set of tools and resources that can be used to build, maintain, and manage custom applications. These APIs enable users to access information from several different sources in one place in order to improve the efficiency of their workflows. Unified APIs also provide users with the ability to communicate between different applications and services, making it easier for developers to create complex interconnected systems. Finally, unified APIs enable the use of powerful analytics tools for more accurate decision-making based on data stored in multiple systems. Compare and read user reviews of the best Unified APIs currently available using the table below. This list is updated regularly.
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1
Boss Insights
Boss Insights
Boss Insights’ platform digitizes lending to grow relationships between banks and their business clients. Thanks to Amazon style advancement, there is a growing divide between lenders’ service and businesses’ expectations. Banks excel in regulation, however, operate with limited information on their business clients (out of date and gathered manually). Boss Insights’ API hub empowers lenders to bridge the divide. APIs are the most efficient way to digitize existing processes enabling accelerated service and a complete view in real time. The platform is used to accelerate SBA, SMB and Commercial Lending from months to minutes. It also supports cross-selling products empowering banks and credit unions to proactively serve customers. -
2
Plaid
Plaid
Plaid is a global fintech infrastructure platform that enables businesses and consumers to securely connect to financial data and services. Through APIs that connect to more than 12,000 financial institutions across 20+ countries, Plaid operates the world’s largest open banking data network. By removing the complexity of direct bank integrations, Plaid enables developers, financial institutions, and enterprises to build secure, user-friendly, and conversion-optimized financial products. Plaid powers payments, lending, identity verification, fraud prevention, and personal finance applications. Today, more than 100 million people worldwide, including half of U.S. adults, have relied on Plaid through their connections to over 7,000 apps and services.Starting Price: Free -
3
Apideck
Apideck
Apideck eliminates the complexity of integrations with a single real-time API that connects to 200+ platforms across CRM, Accounting, HRIS, File Storage, and eCommerce without the technical overhead. Instead of spending months building and maintaining multiple integrations, SaaS companies go to market 98% faster while we take care of maintenance, versioning, and infrastructure. Our platform lets you focus on business growth while we handle the integrations, so you can launch faster, cut costs, and scale without limits. Why leading SaaS teams choose Apideck: ✅ One platform, unlimited integrations – No need to build or maintain separate integrations. ✅ Real-time data – No caching means instant, up-to-date information. ✅ Flexible, cost-effective pricing – API call-based, so you only pay for what you use. ✅ Enterprise-grade security – GDPR & SOC2 Type 2 compliant. ✅ Mission-critical reliability – 99.8% uptime SLA with 24/7 support.Starting Price: $599 -
4
Ayrshare
Ayrshare
Ayrshare's APIs provide the core infrastructure for social media posting, management, and analytics. Manage multiple user social media accounts at a discounted rate. Great for SaaS, CMS, DAM, Agencies, and Platforms. The Ayrshare API takes care of the social media infrastructure so you don't have to. Supports Twitter, Facebook, Instagram, TikTok, LinkedIn, Telegram, Reddit, and Google My Business. Get advanced analytics for your post links including likes, retweets, clicks and device type. Also get a weekly email summary. Automatically add hashtags to your posts based on the most relevant keywords. Takes into account real-time hashtag popularity. Promote your tweet as an ad to increase its reach and help it find a bigger audience. Retrieve, post, and manage comments on a post. Never miss an opportunity to increase engagement.Starting Price: $499 Business Plan -
5
API2Cart
MagneticOne
Unified shopping platform API integration solution. API2Cart is a unified shopping platform data integration interface that makes a connection with multiple shopping cart software APIs simple and effective. Service supports integration with 45+ eCommerce platforms, including Magento, Shopify, Wix, Amazon, Otto, PrestaShop, OpenCart, VirtueMart, BigCommerce, WooCommerce. It can be used by software vendors who work in the sphere of Mobile Commerce, Social Commerce, Marketing Automation, Inventory Management, Order Management, Shipping Management, Dropshipping Automation, and others. KEY FEATURES: 1) A unified approach to integration. You integrate once and get connected to as many shopping platforms as you need. 2) Scalable infrastructure. Flexible architecture allows adding a growing number of customer stores. 3) Focus on data security and the convenience of your customers. SSL certificate and OAuth make data interaction secure.Starting Price: $300 per month -
6
Codat
Codat
Codat helps banks build deeper connections with business customers. We offer products that make it easy to access, synchronize and interpret data from customers’ financial software for specific use cases, such as onboarding suppliers to commercial card programs and underwriting business loans. Codat is used by the largest banks in the world to grow share of wallet, reduce churn & scale their operations. We are backed by leading investors including JP Morgan, Canapi Ventures, Shopify, Plaid, Tiger Global, PayPal Ventures, Index Ventures and American Express Ventures.Starting Price: Free Trial -
7
Postproxy
Postproxy
Postproxy replaces a dozen platform-specific integrations with a single REST endpoint. Send one request with your content and target profiles, and Postproxy handles format conversion, OAuth, token refresh, rate limits, retries, and per-platform delivery — returning structured outcomes for each network. Beyond publishing, it manages post comments, direct messages, replies to Google Business reviews, and pulls profile and follower stats, covering the full posting lifecycle through one API. It supports Instagram, Facebook, Threads, TikTok, X, YouTube, LinkedIn, Pinterest, Bluesky, Telegram, and Google Business, with Reddit coming soon. Official SDKs cover TypeScript, Python, Ruby, Go, Java, .NET, and PHP, plus webhooks, an MCP server for AI agents, and integrations with n8n, Zapier, Make, and Needle. Built for SaaS, automation pipelines, and agencies. EU-hosted and GDPR-compliant. Free tier, no credit card required.Starting Price: $17/month -
8
Flockler
Flockler
Gather and display Instagram images, Tweets, Facebook posts, and more on any digital service to increase time spent on site and drive conversions. Increase time spent on site with fresh and engaging content. Improve conversion rates with social proof. Grow engagement and followers on social media. Start by selecting Hashtags, Usernames, and Pages from social media channels such as Instagram, Facebook, Twitter, Youtube, Pinterest, and more. For example, add hashtags and usernames on Instagram that you’d like your feed to display. You can combine multiple social media channels and show them all in one place! With Flockler, you can display the content you’ve gathered with multiple layouts. You can create as many Walls, Grids, Carousels, and Slideshows as you like and display them on an unlimited number of websites, mobile apps, intranets, and digital screens for the same subscription fee.Starting Price: $110 per month -
9
Stackpile
Stackpile
We make it easy to install apps, tags, and integrations on your website and track your analytics using a simple unified API. Add or remove new 3rd party integrations by updating your stack. Not making changes to your code. We're adding new integrations every day for you to try. Track your customer events data and analytics with Stackpile and have it automatically sent to all your connected apps, tools and integrations. Making sure all your 3rd party apps and integrations are up to date with the latest version can be a pain. With Stackpile we do that for you. Use our Unified Analytics API to track custom events and user identifications. Stackpile allows you to save time and development costs by sending data to all your apps and integrations without implementing each API separately. Without Stackpile you need to implement a code snippet for each integrations you want to install. After adding Stackpile you can install any of our supported apps, tools and integrations with one click.Starting Price: $20 per month -
10
Finch
Finch
The world is moving towards more standardized, open, and interconnected data systems. However, employment infrastructure remains complex, closed, and fragmented. Our mission is to democratize access to the infrastructure that underpins the employment sector and unlock much-needed innovations and create tremendous economic activities for both employers and employees. Seamlessly connect to payroll and HR systems. Employee data is dispersed across many closed systems. Finch smoothes over the difference between systems and unifies access with a single integration to support many innovative use cases. As we add new systems, you can turn them on in one click. Let employers grant your application access to their payroll and HR systems. Finch Connect makes this process instant, secure, and compliant. We obsess over the right abstractions and the developer experience to design the simplest, yet most powerful, API interface for payroll and HR systems.Starting Price: $50 per connection/mo -
11
Fusebit
Fusebit
Our code-first integration platform and SaaS connectors remove the headaches of dealing with many different APIs. Fusebit offers connectors to the most common SaaS systems and we add more connectors weekly. However, our code-first platform is fully open and allows you to modify Fusebit connectors and add custom integrations to any system. With Fusebit, you are never limited in which systems you can connect to! Our product enables developers like you to quickly add integrations to an application using powerful API building blocks. It takes away the pain of developing against many disparate APIs while maintaining the flexibility and familiarity of a code-first platform. Just like Stripe solves payments for application developers, Fusebit solves integrations.Starting Price: $199 per month -
12
Pyas
Pyas
With a single API, you can integrate with Google Calendar and Microsoft Outlook. You can also integrate with Zoom and Google Meet to add conferencing to calendar events. Our API can be implemented easily within your current tech stack, without the need to install any new dependencies. Simply use cURL or whatever HTTP client that you're already using to make API requests. OAuth configuration is as easy as providing a redirect URL for your app to Pyas. When connecting new accounts, Pyas will use that URL to redirect users to your app. You can generate as many API keys as you need. Keys are encrypted and you can set them to expire after a period of time if you need to create temporary API keys. Use your API keys to start managing calendar events.Starting Price: $45 per month -
13
Precise API
Forwardly
The Precise API offers essential insights into the financial health of business clients, including historical, real-time, and forecasted performance. The Precise API supports all leading accounting platforms with real-time push and pull functionality and is ideal for financial institutions, lenders, and fintechs that work with small and medium-sized businesses. A powerful add-on for the Precise API, Predict as a Service supports your business clients with a premium, white-label cash flow forecasting and scenario planning portal. Keep eyes on your products with a cash flow solution that will give your clients a reason to keep business data connected and engage with your brand for their financial needs.Starting Price: $5 per month -
14
Smartcar
Smartcar
Smartcar’s vehicle API enables you to verify mileage, manage EV charging, issue digital car keys, track fleets, and much more. Smartcar enables mobility businesses to integrate their apps and services with connected cars. Easily retrieve vehicle data and trigger actions with our simple and secure car API. Track a vehicle’s location, verify mileage, charge an EV, share a virtual key, and more. With our Smartcar Connect flow, your customers can instantly and effortlessly link their cars to your app. All it takes is four clicks directly from your mobile application or web portal. Our friendly documentation and SDKs allow you to quickly integrate our car API with every tech stack.Starting Price: $19.99 per month -
15
APIPark
APIPark
APIPark is an open-source, all-in-one AI gateway and API developer portal, that helps developers and enterprises easily manage, integrate, and deploy AI services. No matter which AI model you use, APIPark provides a one-stop integration solution. It unifies the management of all authentication information and tracks the costs of API calls. Standardize the request data format for all AI models. When switching AI models or modifying prompts, it won’t affect your app or microservices, simplifying your AI usage and reducing maintenance costs. You can quickly combine AI models and prompts into new APIs. For example, using OpenAI GPT-4 and custom prompts, you can create sentiment analysis APIs, translation APIs, or data analysis APIs. API lifecycle management helps standardize the process of managing APIs, including traffic forwarding, load balancing, and managing different versions of publicly accessible APIs. This improves API quality and maintainability.Starting Price: Free -
16
Propexo
Propexo
Propexo is a unified API platform designed to streamline integrations with leading property management systems. It enables engineering teams to implement integrations in weeks rather than months, thanks to its modern API and clear documentation. Propexo handles the maintenance of integrations, mitigating issues caused by changes in PMS platforms, allowing teams to focus on building customer-centric features. By offering a single integration that works across multiple PMS platforms, Propexo simplifies the development process and accelerates time-to-market for proptech solutions. It provides a robust developer experience with features like webhooks, comprehensive documentation, and Slack support. Propexo's unified data model ensures consistent data handling across different systems, enhancing reliability and efficiency. Trusted by fast-growing companies in the proptech industry, Propexo empowers businesses to save time, reduce costs, and unlock new revenue streams.Starting Price: $845 per month -
17
Unipile
Unipile
Unipile is a unified API designed to integrate multiple communication channels, messaging, email, calendar, and more, into your software application. It provides over 500 endpoints that enable developers to connect platforms such as LinkedIn, WhatsApp, Instagram, Gmail, Outlook, and IMAP into a single unified inbox. With Unipile, you can send and retrieve messages across channels, manage calendars (Google/Outlook), sync conversations in real time, and maintain full historical context across channels. The API supports functions such as starting chats, retrieving message threads, scheduling events, and connecting profile data, all through the same interface. Use-cases include ATS/CRM software publishers, outreach tools, no-code builders, and AI agent platforms, anywhere multi-channel communication needs to be embedded into an application. Unipile also emphasizes rapid integration, developer-friendly documentation, and live support.Starting Price: €49 per month -
18
Zernio
Zernio
Zernio is a unified social media API platform that enables developers and AI agents to publish, schedule, and manage content across 14+ social networks through a single integration. Instead of building separate integrations with each platform, developers make one API call and Zernio handles authentication, media formatting, rate limits, and platform-specific requirements. The platform supports post scheduling, content management, comments and DMs automation, analytics tracking, ads management, and media uploads. It integrates with Instagram Business and Creator APIs, TikTok Business API, LinkedIn, YouTube, Twitter/X, Facebook, Pinterest, Reddit, Threads, Bluesky, and WhatsApp Business API. Features include automatic token refresh, webhook notifications, and rate limit management. Built for SaaS companies, agencies, and AI agent builders, the product is fully white-label.Starting Price: $19/month -
19
OpenGraph
OpenGraph
OpenGraph.io is a developer-focused web API service that fetches and returns structured metadata from any given URL, primarily Open Graph tags such as title, description, image, and other relevant page information, so applications can generate rich link previews, embed contextual content, and automate metadata extraction without building custom scrapers. It works even on pages that lack well-defined Open Graph tags by inferring missing values from the page’s HTML, and offers different endpoint capabilities, including pure Open Graph tag extraction, more extensive content extraction (headers, paragraphs, structured page text), full HTML scraping with JavaScript rendering support, and high-speed screenshot capture for visual previews of web pages. The API returns data in a consistent JSON format tailored for integration into workflows, dashboards, apps, and marketing or content platforms, and developers can call it programmatically using API keys with SDKs or standard HTTP requests.Starting Price: $25 per month -
20
NexHealth
NexHealth
Deliver an end-to-end patient experience that integrates in real-time with your practice management system. The only solution that reads and writes data in real-time with your practice management system. We spend most of our engineering resources on creating the best bidirectional integrations with EHR and practice management systems. Now you can develop and deploy your product in weeks, not years. Our engineers consume our own API to build our own doctor-facing SaaS product, so you know you will always get an experience that is tested and can scale. Online patient scheduling allows visitors to see your availability in real-time and schedule appointments on-demand from any location or device. NexHealth scheduling software fully customizes your schedule right out of the box. Our team of product experts helps implement both your calendar of record and your EHR system – no matter how complex your schedule. -
21
Railz
Railz.ai
Railz is building the largest financial data network by bridging the connection between future-thinking financial institutions and real-time accounting data. Railz accomplishes this through an API that connects financial institutions to all major accounting software solutions, such as QuickBooks, Xero, and Sage. We offer financial institutions (FIs) the ability to connect with account service providers, collect data, normalize and sanitize that accounting data, and analyze it. Railz enables on-demand access to financial transactions, analytics, insights and reports on small and medium business (SMB) customers. Whether you’re a lender, financial institution, accounting firm, auditor, or startup developer that requires financial data, we can make this a reality for you - and fast. -
22
Argyle
Argyle
Argyle is the leading provider of direct-source access to real-time income and employment data. With Argyle, companies automate critical workflows—including income and employment verifications, deposit switches, wage advances, and loan repayments—so they can build better, more efficient processes, reduce risk, and scale their business. Argyle largely serves the mortgage, background checks, personal lending, and banking industries as well as the gig economy. -
23
Knit Unified API
Knit
Knit offers a common data model for all apps within a category along with world class data security. So, integrating hundreds of apps is not only easier, it’s also safer for you. Users stay within your own app while integrating with the apps they use. Our embedded integrations, white-labelled auth and drop-in frontend components help your users power integrations with just a few clicks. With Knit you can skip the data transformation nuances and complex processes for different APIs and scale integrations 10x faster. Knit maps different data schemas from different applications into a single, unified data model for each category of integrations and syncs the normalized data in real-time. Knit is the only unified API that does not store any of your end user data on its servers. The syncs happen over a 100% webhook-based architecture for enhanced data security.Starting Price: $999 per month -
24
Integration Labs
Integration Labs
We make interacting with your business customers' financial data easy. Start shipping tools to underwrite credit risk, automate accounting, and perform analytics. Provide automated reconciliation and synchronize your business customers' payables and receivables data. Automate accounting reconciliation and dynamically increase credit limits with read and write access to accounting and payments data. Streamline your credit underwriting processes with access to accurate and standardized data. View all customers and vendors, as well as invoices, bills and payments, across any accounting platform. We are committed to maintaining the highest privacy, security and compliance standards for you and your customers’ sensitive information.Starting Price: $5 per month -
25
Truto
Truto
Truto is built to be declarative from the ground up. You can add new and customize every existing Integration and Unified API that we provide. Play around with the product without having to plug in your real accounts. We provide sandbox accounts for all the integrations that we support. We believe that the best developer experience is achieved by hand-crafting SDKs. We understand how frustrating it is when the API and documentation differ like oranges and apples. Truto offers options to store data in a region of your choice. Push data from third-party APIs directly to your database. Truto offers support for vector databases too. With self-hosting options, data will never leave your virtual private cloud. With advanced user management, control access for team members.Starting Price: $125 per month -
26
Vessel
Vessel
Our developer-first platform is flexible enough to power all of your customer-facing integrations. Vessel regularly handles terabytes of data and billions of API calls. Vessel is proud to be SOC2 compliant, demonstrating our commitment to maintaining the highest level of security and trust in our operations. Data is encrypted in transit and at rest using industry-standard encryption protocols. -
27
Terra API
Terra
Health data for your users originates from multiple sources, such as Garmin, Fitbit and Oura, in a variety of forms. We make sense of this health and fitness data, allowing you to access it structured manner, no matter the source. New updates are continuously pushed to your app through webhooks, whenever activities are available. Have your data normalized into the format that best suits your needs. Terra also allows you to retrieve past data for your users. This way, you can enrich your machine learning models, deepen your insights, or simply provide more value to your customers. Clear documentation providing seamless authentication using either our widget or our authentication end points. Easily add, remove, and pause providers through our dashboard, and watch your widget update live.Starting Price: $399 per month -
28
Duffel
Duffel
Any business - from travel startups to financial enterprises - can build with Duffel. Shop flights and accommodation, purchase extras, manage bookings and more. Leverage thousands of hours of expertise in travel and product design. Your customers can search for their preferred flight instantly using autocomplete functionality, search filters and more. Capture and control employee spending from within your platform by selling flights inside your spend management solution. Build an intuitive flight search, offer loyalty program perks, add seats and bags, manage your orders, and more. Earn commission on over 1 million properties globally. Build an intuitive hotel shopping experience, giving your customer the information they need and access to their loyalty benefits. A ready-made, customizable flight-shopping experience is available to offer to your customers from day one.Starting Price: $3 per order -
29
Agave
Agave
Agave API gives you a single API to read and write data from software commonly used in construction and field services. Our integrations span software used in project management, scheduling, financials, document storage, and more. Adding integrations unlocks sales and improves retention. However construction tech is fragmented and siloed, and integrations are complex to develop and maintain. It can take months to integrate with one system, and hours each week having to monitor and maintain these integrations. Agave lets you read and write data from many systems of record in construction, unblocking sales and expanding retention of your customers. A unified API that lets you read and write data from source systems that users grant your application access to.Starting Price: $500 per month -
30
BuiltAPI
BuiltAPI
BuiltAPI is a low-code integration platform designed for the real estate investment and asset management industry. It connects siloed systems, normalizes fragmented data, and automates reporting across portfolios. With connectors to leading property, finance, and ESG platforms, BuiltAPI eliminates manual file handling and reduces onboarding time for new assets. Its flexible API framework supports standardized data models for valuation, performance, and sustainability metrics, enabling scalable automation of recurring workflows. BuiltAPI helps asset managers, fund controllers, and valuation teams gain faster access to reliable, auditable information. By providing a single integration layer, it improves transparency, reduces operational risk, and ensures compliance with evolving regulations such as CSRD. The platform is trusted by institutional investors and service providers to power digital transformation in real estate, delivering secure, efficient, and data infrastructure.Starting Price: $900 per month
