6 SaaS integration platforms worth evaluating in 2025

As you look to build internal or customer-facing integrations, you’ll likely run into dozens of vendors with similar websites and marketing messages.

To help you sift through the noise, we’ll provide a shortlist of the most powerful, reliable, and innovative SaaS integration solutions in the market.

But before we do, let’s align on the definition of a SaaS integration platform.

What is a SaaS integration platform?

It's a 3rd-party tool that lets you connect SaaS applications either within your organization’s tech stack or between your customers’ tech stacks and your product. 

The overarching goal of any SaaS integration platform is to accelerate the process of building integrations and save your developers significant time.

Related: What you need to know about SaaS integrations

Best SaaS integration platforms for internal business processes

Here are some of the best SaaS integration platforms for supporting your internal workflows. 

Zapier

Zapier is a task automation platform that lets you build “Zaps” to automate just about any task imaginable.

Pros:

• Ease of use: Non-technical teams within marketing, sales, and support, for example, can use Zapier’s no-code tool themselves to build automations across their apps

• Comprehensive connectivity: Zapier now supports more than 8,000 connectors across more than a dozen categories, ensuring that it can support all of your organization’s integration needs

•  Fast time to value: Zapier’s template library lets you search for and use pre-built Zaps across their top use cases. You can use their Zap templates as is or build on top of them

Cons: 

• Lacks several advanced workflow features: You may need to use advanced features like nested logic (e.g., using conditional statements inside of conditional statements) to build more complex workflows. Zapier, in many cases, doesn’t support these features natively

• Lacks HIPAA compliance: If you plan on supporting workflow automations that use protected health information under HIPAA, you can’t use Zapier

• Recent data leak: Zapier recently had a security incident related to a two-factor authentication misconfiguration that led to customer data leaking to an unauthorized user. And while this likely won’t happen again, the fact that it happened to begin with is a sign that their security protocols and infrastructure aren’t bullet proof

Workato

Workato is an integration platform as a service (iPaaS) that’s geared towards enterprise companies.

Pros:

• Enterprise-grade security: Workato complies with HIPAA, GDPR, and other key data privacy and protection regulations; they provide extremely fine-grained roles for users (e.g., a user can edit workflows but can’t deploy them); they offer comprehensive version control history, and more

• AI-powered enablement: Workato offers AI copilots that can help you build or modify automations (i.e., which they refer to as “recipes”) through plain text, document your automations, provide feedback on improving them, and more

• Diverse offerings: Workato also lets you develop and manage API endpoints, AI agents, customer-facing workflow automations, and more

Cons:

• Lacks support for SMBs: Workato typically charges tens of thousands, if not hundreds of thousands—of dollars per year. As a result, small and medium-sized businesses (SMBs) are excluded from it

• Technically complex to use: While Workato brands itself as a low-code tool, understanding the nuances of their recipe builder (or workflow automation builder) requires technical expertise. And while their copilots support integration development to an extent, you ultimately need someone who can review and validate your recipes

• Resources are spread thin: By building and supporting a plethora of solutions, Workato can’t improve the individual features and functionality for their core integration offering as fast as you might expect and want

Related: A look at Workato’s top competitors

Mulesoft

Mulesoft offers an iPaaS (i.e., their “Anypoint Platform”) along with other solutions to support AI agents, manage API endpoints, and more.

Pros: 

• Ample resources: Since Mulesoft is part of Salesforce, they have access to world-class infrastructure, product expertise, enterprise customer support teams, and more

• Supports on-prem and hybrid use cases: Mulesoft was founded before the proliferation of SaaS apps (2006), so the platform was built to integrate modern cloud applications with legacy, on-prem systems 

• Broad solution offerings: Like Workato, Mulesoft supports an increasing number of products, with an increased focus on managing AI agents for internal processes

Cons:

• Overkill for simple use cases: MuleSoft isn’t designed for simple, point-to-point integrations (e.g., connecting two SaaS apps). It’s built for orchestrating complex, multi-system integrations and automating mission-critical processes (e.g., order-to-cash). As a result, many SMBs likely shouldn’t use it

• Difficult to transition away: The learning curve for the Anypoint platform is resource and time intensive. This makes it all the more difficult to move away from the platform

• Bias toward Salesforce products and services: Since MuleSoft is owned by Salesforce, its integrations with Salesforce products are likely prioritized. In other words, Mulesoft’s integrations with apps outside the Salesforce ecosystem may receive less native depth or ongoing optimization

Best SaaS integration platforms for customer-facing use cases

If you’re looking for a tool to build product integrations, here are some of your best options.

Merge

Merge offers a Unified API that lets you add hundreds of integrations to your product. 

Pros: 

• Best-in-class support: Merge’s post-sales team is not only responsive—they’re also true integration experts that help customers navigate all of the complexities of taking integrations to market. This can be anything from helping customers decide how to price the integrations to brainstorming the best marketing tactics for promoting them to providing guidance on the best ways to support them

• Multi-category support: Unlike most unified API solutions, Merge supports integrations across a wide range of software categories—and this list is quickly growing

• Integration observability: Merge offers intuitive and comprehensive tools to help customer-facing teams manage their customers’ integrations. This includes fully-searchable logs, automated issue detection functionality, and a dashboard that provides holistic integration insights

• Success with the enterprise: Merge works with the leading LLM providers, banks, and other prominent SaaS companies, which validates the platform’s enterprise-grade security, scalability, and support

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Paragon

Paragon offers an embedded iPaaS, which lets you build integrations and workflows automations through their workflow builder.

Pros: 

• AI support: Like Merge, Paragon offers an MCP server that can help your AI agents access customers’ 3rd-party applications via tools

• Pre-built connectors: Paragon provides 130+ pre-configured integrations across more than a dozen software categories to help you build integrations and automations faster

• Enterprise-grade security: Paragon’s enterprise price plan lets you access security features and capabilities like SSO, role based access control, and the ability to deploy and run their integrations on your own servers

Cons: 

• Difficult to scale: Paragon forces you to build one integration at a time. If you need to build several integrations, quickly, this approach can be problematic

• Requires technical expertise: Paragon is built for developers, but your dev team will likely need weeks to become familiar with the platform’s UX, which delays your integration timelines even further

• Shallow observability features: Paragon doesn’t offer key capabilities for managing integrations. For example, Paragon doesn’t support issue detection functionality, putting the onus on your team to build and maintain it

Related: The top alternatives to Paragon‍

Finch

Finch offers a unified API platform that focuses exclusively on HR and payroll integrations.

Pro: 

• Broad coverage: Finch offers more than 250 HR and payroll integrations, which will likely cover all of your customers’ integration needs for these categories

• Scalable approach: By enabling you to access hundreds of integrations through their unified API, you can quickly and easily scale your HR and payroll integration offerings

• Established business: Similar to Merge, Finch has been around for several years, has tens of millions of dollars in funding, and has hundreds of customers (Merge has tens of thousands of customers). In other words, you don’t need to worry about Finch going out of business any time soon 

Cons:

• Insecure integrations: Many of Finch’s integrations are “assisted”, which essentially means that a member of their team needs to manually log into your customers’ apps to retrieve data. This approach introduces a variety of security and compliance risks and likely won’t be comfortable for your customers

• Shallow category coverage: As your business grows, your integration needs will likely extend beyond HRIS and payroll. Since Finch doesn’t support additional categories, you’d be forced to search for another integration platform

• Infrequent data syncs: Finch’s integrations can take weeks to sync data (especially in the case of assisted integrations). If your integrations need to support at least somewhat time-sensitive workflows, this likely won’t work for your business 

Related: Finch API’s top alternatives

How to evaluate SaaS integration platforms

Whether you’re looking at internal or customer-facing integration platforms, you should follow these steps before deciding on any.

Review the vendors’ reputations on 3rd-party review sites 

Sites like G2 have a rich set of customer reviews that can help you analyze vendors across the areas you care about most, whether that’s security, support, integration performance, etc.

Many vendors even use the reviews, along with other factors, to create simple grids for easy comparison. For example, the G2 Grid® for Unified APIs lets you compare Merge with Finch, Codat, Kombo, and the rest of the market with ease.

Related: The top unified API solutions

Go on proof of concepts to better assess the platforms and the teams

Any integration vendor can make attractive, lofty claims. To see which vendors are being honest and to determine the one that best supports your use case(s), you can test a few vendors via a proof of concept (PoC).

This adds additional time and resources for your team, but the long-term benefits of picking the best integration solution for your business makes this step well worth taking. 

Review the vendors’ long-term business viability

The integration market is increasingly crowded with new vendors, many of which either shut down or get acquired—often leading to product sunsets or undesirable changes. Within the past few years alone, we’ve seen this happen to Kloudless (acquired by Netskope), Automate.io (acquired by Notion), and Cloud Elements (acquired by UiPath).

Since you likely want to use a single integration platform for several years, it’s worth doing your due diligence on their business’ health and roadmap, whether that’s by reviewing their recent funding rounds, reading their recent press, or talking directly to their leadership teams about their forward-looking plans.

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