Integration Infrastructure Comparison

Ampersand vs Unified.to:
Native Depth vs Unified API

Ampersand delivers real-time, native direct integrations with depth-first access to the underlying provider APIs. Unified.to offers a unified API that normalizes data into common models across SaaS apps. Here's how they compare for teams building product integrations enterprise customers and AI agents actually need.

See the Full Comparison ↓ Read the Docs

TL;DR — The Key Differences

Ampersand is the native integration infrastructure for AI agents. Agent-ready direct integrations with sub-second webhooks and full custom object support on every tier. Unified APIs like unified.to abstract away the native depth that enterprise customers and AI agents actually need.
Ampersand gives you native API access with full custom object and field support on every tier. Read and write any object, standard or custom, without workarounds.
Ampersand delivers sub-second webhooks via event-driven architecture — critical for AI agents, voice products, and real-time workflows. Unified.to is polling-based like most unified APIs.
Ampersand lets you own and export your OAuth credentials. Unified.to holds your customers' tokens, so switching providers means every customer must re-authenticate.
Ampersand gives you native depth instead of a lowest-common-denominator abstraction. Unified.to normalizes everything into common models. That's great until your customer needs a custom object or a provider-specific field, at which point you're dropping into passthrough calls and paying for an abstraction you're bypassing.

Feature-by-Feature Comparison

How the two platforms stack up across the dimensions that matter most for product integrations.

Dimension	Ampersand	Unified.to
Philosophy	Depth-first, native API access Enterprise-ready	Breadth-first, common data models
Connectors	250+ across 15 categories	200+ across CRM, HRIS, ATS, ticketing, marketing
Custom Objects	Full native support, all tiers All plans	Passthrough calls; not covered by unified models Abstraction leak
Custom Fields	Full read/write on every connector	Limited; requires passthrough or custom mapping
Per-Customer Field Mapping	Built-in with embeddable UI Included	Not a first-class feature
Data Freshness	Sub-second webhooks (event-driven) Real-time	Polling / scheduled sync Not real-time
Sync Direction	Bi-directional with conflict resolution	Primarily read; write varies by category
Credential Ownership	You own & export OAuth tokens Your keys	Vendor holds tokens Vendor lock-in
Configuration	Declarative YAML in Git + CI/CD	REST API calls from your app
AI / Agent Support	Open-source AI SDK + MCP server Agentic-ready	REST API only
Embeddable UI	White-labeled React components for auth, field mapping, sync settings	Auth widget; no first-class mapping UI
Open Source	250+ connectors as Go libraries on GitHub Inspect + extend	Closed source
Compliance	SOC 2 Type II, GDPR, ISO 27001	SOC 2 Type II, GDPR, HIPAA
Pricing Entry	Free tier → $999/mo (usage-based)	Free tier; paid plans per connection/user

Where Ampersand Wins

The advantages that matter most when you're selling to mid-market and enterprise customers.

🧩

Full Custom Object Support

Ampersand lets you read and write any object or field — standard or custom — on every tier. Unified APIs like Unified.to normalize data into common models, which means the moment your customer has a custom object or a provider-specific field, you're bypassing the abstraction via passthrough calls. Paying for abstraction you can't actually use is a bad deal.

⚡

Sub-Second Real-Time Sync

Ampersand's event-driven architecture delivers webhook notifications in under one second. 11x cut their AI phone agent's CRM response time from 60 seconds to 5. Unified API providers are almost universally polling-based, which can't support conversational AI, voice agents, or real-time workflows.

🔑

Your Keys, Your Integrations

Ampersand lets you own your customers' OAuth credentials. Import existing tokens. Export them if you ever leave. Customers never re-authenticate if you switch. Unified.to holds the tokens on your behalf.

🗃

Integrations Live In Your Codebase

Ampersand integrations are defined in amp.yaml files committed to your repo. They go through PR review, CI, and git revert like everything else. A REST API dependency puts the integration logic inside your application code but leaves the platform behavior opaque and versioned outside your control.

🤖

Built for AI Agents

Ampersand's open-source AI SDK exposes integrations as tools that LLMs can invoke. Docs MCP lets Claude Code and Cursor spin up integrations in minutes. Unified APIs give you a REST surface — you build the agent tooling yourself.

📈

Scales From Startup To Enterprise

Unified API models are calibrated to the lowest common denominator across providers. That's fine for SMB customers on vanilla SaaS configs. It's not fine when your first enterprise deal wants their 40-custom-object Salesforce schema wired through. Ampersand lets you meet customers where they actually live.

Pricing at Scale

Integration costs should shrink as a percentage of revenue, not grow.

Ampersand

$999 /month

✓ Free tier available
✓ Transparent usage-based credits
✓ Custom objects included on all tiers
✓ Per-customer field mappings included
✓ Sub-second webhooks included
✓ Credential ownership & export
✓ SOC 2 Type II, GDPR, ISO 27001
✓ AI SDK & Docs MCP included

Unified.to

Free tier + paid

✓ Free tier for development
⚠ Paid plans per connection/user
✗ Custom objects require passthrough calls
✗ Polling-based, not real-time
✗ Vendor holds OAuth tokens
✗ No first-class field mapping UI
✗ No native AI agent tooling
✓ SOC 2 Type II, GDPR, HIPAA

What Customers Say

"Using Ampersand, we cut Julian's response time from 60 seconds to 5."

Muizz Matemilola, Engineering — 11x

"We chose Ampersand because we want to build an integration that we don't need to rebuild, and we want to meaningfully accelerate our upmarket journey."

Kshitij Grover, CTO — Orb

"Ampersand is the first developer platform that gets it right."

Eric Engoron, Engineering — Clay

"Ampersand is core to how we grow."

John Peña, CTO — Hatch (acq. by Yelp)

"Ampersand is helping Square connect to more upmarket Sellers, driving strong revenue growth."

Max Friz, Partnerships Lead — Square

When to Choose Each Platform

We believe in being honest. These tools solve different problems — most teams will eventually want both.

Choose Ampersand When You Need…

✓ Deep CRM/ERP integrations with custom objects and fields
✓ Real-time, sub-second data for AI agents or voice products
✓ Per-customer field mappings with embeddable UI
✓ Bi-directional sync with conflict resolution
✓ Credential ownership and zero vendor lock-in
✓ Integrations versioned in Git alongside your product code
✓ Mid-market and enterprise customers with complex schemas
✓ An integration you don't need to rebuild as you scale

Choose Unified.to When You Need…

✓ Shallow, read-heavy coverage across many SaaS categories
✓ A unified data model good enough for SMB customers on vanilla configs
✓ Quick prototypes across HRIS/ATS/CRM in a single REST surface
✓ A low-cost free tier for early experimentation
✓ Batch data where polling latency is acceptable

Outgrowing A Unified API?

When your first enterprise customer asks about custom objects, you need depth, not abstraction. Ampersand supports token import so your existing customers don't re-authenticate when you move.

Speak with an Engineer →

Frequently Asked Questions

For a handful of standard fields across many providers, yes. The trouble starts the moment your customer needs something specific — a custom object, a custom field, a provider-specific flow. At that point you drop into passthrough calls and lose the benefit of the abstraction while still paying for it. Ampersand skips the abstraction and gives you native access from day one.

When data changes in your customer's CRM or ERP, Ampersand's event-driven architecture detects and delivers that change in under one second. This is critical for AI agents, voice products, and real-time workflows. Unified.to, like most unified API providers, uses polling — which introduces minutes of lag.

Ampersand supports OAuth token import, so your existing customers don't need to re-authenticate. You can migrate one integration at a time. Unified.to does not publicly document a token export path, so you may need to coordinate directly with their support.

Ampersand supports custom objects and custom fields natively on every tier. You can read, write, and sync any object without workarounds. With a unified API, custom objects are either not supported or only available through passthrough requests that you build and maintain yourself.

Yes. Ampersand's open-source AI SDK exposes integrations as tools LLMs can invoke, and the Docs MCP lets AI coding agents like Claude Code and Cursor generate integration configs in minutes. Declarative YAML is machine-readable and machine-writable — a REST surface is not.

Ampersand vs Unified.to: Native Depth vs Unified API