--- title: "What Unified API Solutions Support a Large Number of Integrations?" img: https://s3.us-east-2.amazonaws.com/unified-article-images/what_unified_api_solutions_support_a_large_number_of_integrations-icon.png date: 2026-01-16T16:18:00.000Z tag: Product description: "For developers building SaaS platforms, integrations are no longer a differentiator—they're a requirement. Whether you're syncing HR data, embedding CRMs, or..." url: "https://unified.to/blog/what_unified_api_solutions_support_a_large_number_of_integrations" --- # What Unified API Solutions Support a Large Number of Integrations? ------ _January 16, 2026_ For developers building SaaS platforms, integrations are no longer a differentiator—they're a requirement. Whether you're syncing HR data, embedding CRMs, or enabling real-time file access, the backbone of that work is a [unified API](/technology) platform that can handle it all. But not all unified APIs are built equally. Some offer breadth but little depth. Others specialize in just one category. And only a few offer both scale and reliability across real-time workflows. So which unified API solutions support the most integrations in 2026? This breakdown compares top providers on both _breadth_ (how many integrations they support) and _depth_ (what capabilities they provide). We've analyzed public docs, integration directories, and real-time sync infrastructure across 8 leading platforms. ## The Short Answer - **Unified.to** supports the largest number: **370+ integrations** across **24 categories**, with real-time sync, full CRUD, and deep object support. - **Merge.dev** follows with ~220 integrations, mostly focused on HR, ATS, and CRM. - **Apideck** offers ~200 integrations across core SaaS verticals. - **Truto** covers 250+ integrations with strong real-time passthrough. - **Paragon**, **StackOne**, **Finch**, **Kombo**, and **Nylas** round out the list, with more specialized or category-focused offerings. ## Breadth: Who Has the Most Integrations? | Platform | Approx. # Integrations | Primary Categories | | -------------- | ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------- | | **Unified.to** | 370+ | HR & Directory, ATS, Accounting, E-Commerce, Knowledge Management, CRM, Advertising, Call Center, Calendar & Meetings, _+ 14 more_ | | Merge.dev | 220+ | HRIS, ATS, CRM, Accounting, Ticketing | | Truto | 250+ | CRM, Messaging, HR, Storage, Security | | Apideck | 200+ | CRM, HRIS, ATS, Accounting, File, Support | | Paragon | 150+ | CRM, Email, Marketing, Calendar | | StackOne | 200+ | ATS, CRM, Messaging, HRIS, IAM | | Finch | 250+ (HR/payroll only) | HRIS, Payroll | | Kombo | 100+ (HR only) | HRIS, ATS, LMS, Assessment | | Nylas | Email/calendar focused | Email, Calendar, Contacts | Unified.to leads with the most integrations _and_ the most categories. ## Depth: What Can You Actually Do With These Integrations? Breadth matters, but integration depth determines what kind of product experiences you can build. We looked at five dimensions: - **Supported Objects**: How many objects (e.g. `messages`, `deals`, `files`) are unified per integration? - **Field Coverage**: Do they support custom fields? Passthroughs? Raw access? - **Read/Write**: Can you create and update records, or only fetch? - **[Webhooks](/blog/replacing_polling_with_unified_webhooks_and_virtual_streams)**: Are events real-time? Simulated? Delayed by hours? - **Auth**: Do they manage [OAuth](/embeddedauth), API keys, and token refresh securely? ### Unified.to - **Objects**: 1,400+ unified objects across categories - **Fields**: Full normalized schemas + passthrough fields - **Read/Write**: Full CRUD across most providers - **Webhooks**: Native or virtual, real-time across all connectors - **Auth**: Embedded UI, token management, permission scopes ### Merge.dev - **Objects**: Core schemas only (Employees, Jobs, etc.) - **Fields**: Custom fields via passthrough - **Read/Write**: Partial write support; mostly read - **Webhooks**: 24h polling by default; webhook events limited - **Auth**: Managed OAuth, scopes, and refresh ### Apideck - **Objects**: Standardized per API category (CRM, HRIS, etc.) - **Fields**: Supports raw mode for custom fields - **Read/Write**: Full CRUD on supported providers - **Webhooks**: Virtual webhooks with 24h polling unless upgraded - **Auth**: OAuth & API key support; token storage required ### Truto - **Objects**: Fully configurable; supports custom schemas - **Fields**: All vendor fields available via real-time passthrough - **Read/Write**: Yes, on all supported platforms - **Webhooks**: Native + synthetic, sub-hour intervals via RapidBridge - **Auth**: SCIM, API key, OAuth 2.0 ### Paragon - **Objects**: Action-based, no unified schema - **Fields**: Mapped per provider action - **Read/Write**: Yes, through provider-specific actions - **Webhooks**: Native + polling (1min interval) - **Auth**: Drop-in OAuth components ### StackOne - **Objects**: Unified schemas for AI-native apps - **Fields**: Normalized + passthrough - **Read/Write**: Yes, full support - **Webhooks**: Native + synthetic (down to 5 min) - **Auth**: OAuth proxy + key rotation ### Finch / Kombo / Nylas - **Category-specific** depth: - Finch: strong payroll/HR field model, mostly read-only - Kombo: solid HRIS/ATS coverage, webhook delays (3h+) - Nylas: full read/write for email/calendar, but limited object diversity ## Real-Time Sync: Who's Actually Fast? Real-time event delivery matters for AI agents, dashboards, and user-facing sync. Here's how sync speed compares: | Platform | Real-Time Events | Default Polling | Notes | | -------------- | -------------------- | ----------------- | ---------------------------------------- | | **Unified.to** | ✅ Native + Virtual | Real-time | Instant events across 100% of connectors | | Merge.dev | ⚠️ Some | 24h | Limited webhook support | | Apideck | ✅ + Virtual | 24h | Upgrade for faster sync | | Truto | ✅ Native + Synthetic | Sub-hour | RapidBridge triggers | | Paragon | ✅ Native + Polling | 1 min | Real-time for most providers | | StackOne | ✅ Native + Synthetic | 1h (5m upgrade) | Cryptographic polling engine | | Kombo | ⚠️ Partial | 3h (10h full) | HR data sync, some webhook support | | Finch | ❌ Read-only | 24h–7d | No real-time sync for most | | Nylas | ✅ Push + Fallback | Real-time or IMAP | Email-native delivery + sync fallback | ## Final Takeaway If you're building an integration layer into your product, **choose based on your required categories, object depth, and sync latency**. - Choose **Unified.to** if you want: - Largest integration surface - Full read/write and object support - Real-time webhook coverage across the board - Passthrough access and LLM-ready data for agents/copilots - Choose **Merge or Apideck** if you're focused on HR or CRM and only need nightly syncs. - Choose **Truto or StackOne** if you're prioritizing passthrough access or custom object support. - Use **Finch, Kombo, or Nylas** only if you're building for a single category like payroll or email. → [Start your 30-day free trial](https://app.unified.to/login) → [Book a demo](https://calendly.com/d/cph9-g8n-jzg/connect-with-unified)