Apideck vs. Unified.to: Two Pass-Through Unified APIs, Different Bets

May 29, 2025

Updated May 2026

Apideck and Unified.to are both pass-through unified APIs — neither caches your customers' business data. The honest difference is what each is optimized for. Apideck is built around an embedded integrations marketplace, with Vault as a white-labeled connection UI and pricing structured around customer-facing integration directories.

Unified.to is built around multi-category breadth (446+ integrations across 26+ categories) with all categories included on every plan, customer-managed secrets, multi-region MCP and credential storage, and Unified MCP positioned as a flagship product for AI agents. Both can serve overlapping use cases; the right choice depends on whether your product treats integrations as a customer-facing surface or an in-product capability.

Apideck and Unified.to are the closest direct comparison in the unified API category. Both share the same architectural posture: a real-time pass-through model that routes API calls to the source system at request time, without caching customer business data on the integration vendor's servers. Apideck explicitly positions itself as a "Unified.to alternative" in its own content marketing — a recognition that the two products are evaluated head-to-head.

But under the shared architecture, the two platforms make different bets. Apideck bets on a polished embedded marketplace UX with Vault as the visible product surface for end-users. Unified.to bets on coverage breadth across 26+ categories (446+ integrations), deeper SDK and embedded auth coverage, and an AI-first product surface anchored by Unified MCP.

This post compares them honestly across coverage, architecture, AI/MCP capabilities, developer experience, security posture, and pricing — with primary-source citations for every meaningful claim.

For a broader survey of unified API alternatives, see Top Merge.dev Alternatives in 2026. For the architectural distinction between pass-through and sync-and-store, see Pass-Through vs. Sync-Based Unified APIs.

What does Apideck do well?

Before evaluating alternatives, a fair view of where Apideck is the right answer:

• Vault as an embedded marketplace product — Apideck's defining differentiator. Vault is a distinct product layer providing hosted or embeddable connection UX, OAuth handling, an integrations directory, and field-mapping UI for end-customers. Vault JS, React Vault, and Vue Vault components drop into your application; Hosted Vault provides a redirect-based flow.
• Strong positioning in finance and procurement-aligned categories — Apideck's 9 core unified APIs (Accounting, CRM, HRIS, ATS, ERP, E-commerce, POS, File Storage, Issue Tracking) align with categories enterprise buyers procure for. Coverage in Accounting and ERP is particularly deep.
• Open-source MCP server (MIT-licensed) — Apideck publishes its MCP server packages on npm (@apideck/mcp-server-crm, plus the broader apideck-libraries/mcp repo) under MIT license. Developers can self-host the MCP server or use Apideck's managed endpoint at mcp.apideck.dev. Apideck markets the MCP server as production-ready (not beta).
• Pay-per-consumer pricing model — Apideck's pricing is structured around "consumers" (your customers using integrations) rather than per-connected-account. For products where a single consumer connects multiple accounts, this can be more predictable than per-account billing.
• Full CRUD operations across unified APIs — Apideck supports create, read, update, and delete operations across most integrations, not just reads. Write coverage varies per-integration but is broadly available.
• Raw Mode and Proxy API as escape hatches — ?raw=true returns the unprocessed provider response in a _raw property alongside the normalized Common Model. The Proxy API supports non-unified endpoints when developers need provider-specific functionality.
• Customer support and founder involvement — Apideck reviews consistently highlight responsive, hands-on support and willingness to add new connectors or endpoints on request.

If your product is built around an embedded integrations marketplace, your category needs are concentrated in Apideck's 9 core unified APIs, or you want a fully open-source MCP server you can self-host, Apideck is worth evaluating on its own terms.

Why teams evaluate Unified.to

Several constraints typically push teams to look beyond Apideck:

• Category access is gated by tier — Apideck's Launch plan ($599/month) includes only 1 unified API category. Scale ($1,299/month) includes 3 categories. Unlimited categories require Enterprise (custom pricing, 300+ consumers minimum). For products spanning multiple categories (e.g., CRM + HRIS + Accounting), the effective entry point is Scale at $1,299/month or Enterprise. Unified.to includes 26+ categories on every plan, starting at $750/month on Grow.
• Custom Field Mapping is gated to Scale — Per Apideck's pricing page, Custom Field Mapping (the feature that lets end-customers map provider-specific custom fields to your unified response) is only available on Scale and above. Teams hitting an enterprise customer with custom HRIS configurations on Launch must upgrade before they can support them.
• White-label Vault is Enterprise-only — Launch and Scale include a "customizable" UI (branding, colors, logo), but Apideck branding remains. Full white-labeled Vault is gated to Enterprise. For products built around a fully branded marketplace experience, this forces an upgrade.
• No published EU data residency or multi-region hosting — Apideck runs on AWS but doesn't publicly document EU vs. US data residency options or multi-region MCP/API hosting. Unified.to publishes multi-region MCP endpoints (US, EU, AU) and customer-selectable AWS regions for credential and secrets storage.
• No customer-managed secrets (BYOK) — Apideck manages all encryption keys via AWS Systems Manager Parameter Store. No customer-managed-key option is documented. Unified.to supports customer-managed secrets via AWS Secrets Manager, GCP, Azure, and HashiCorp Vault on Scale tier and above.
• No SSO, RBAC, or audit logs on lower tiers — Apideck's compliance materials don't document SAML/Okta SSO, role-based access control, or audit logs as Launch or Scale features. Configurable log retention and SSO appear to be Enterprise-only.
• Smaller integration catalog — Apideck uses "200+" as an approximate connector count and doesn't publish a canonical total. Unified.to publishes 446+ integrations across 26+ categories.
• 24-hour default webhook polling — Per Apideck's own help documentation, virtual webhooks for providers without native webhook support poll "at an interval of every 24 hours" by default. Faster intervals are described as adjustable by pricing plan, but the specific cadences per tier aren't published transparently.

Teams that need multi-category integration breadth on a single plan, want customer-managed secrets, need multi-region hosting, or want a flagship AI/MCP product surface often find a different unified API fits better.

Architecture: shared posture, different scope

This is where Apideck and Unified.to are most similar — both are pass-through unified APIs. Per Apideck's homepage: "No data storage: Apideck does not store your customer data." Per Unified.to's security page: no customer payload data is stored at rest, only minimal metadata and secrets.

In practice, both platforms persist:

• OAuth tokens and API keys (for re-authenticating to source systems)
• Connection metadata (which integration, which consumer, which scopes)
• Operational logs (encrypted at rest)

Neither caches the business records (invoices, contacts, employees, tickets) that flow through the integration. This is the architectural category boundary that separates both from sync-and-store platforms like Merge or Finch.

Coverage: breadth and category access

This is the cleanest macro-level differentiator between the two.

Unified.to publishes 446+ integrations across 26+ unified API categories as of May 2026, with a single real-time pass-through surface across all of them. Categories span CRM, HRIS, ATS, Accounting, Messaging, File Storage, Ticketing, Knowledge Management, Marketing Automation, Calendaring, Enrichment, AI Tooling, and more.

Apideck organizes coverage around 9 core unified APIs (Accounting, CRM, HRIS, ATS, ERP, E-commerce, POS, File Storage, Issue Tracking) plus additional unified APIs beyond these core domains. Apideck does not publish a canonical headline integration count; marketing language uses "200+" as an approximation. Apideck describes its coverage as focused on "the categories enterprise buyers actually procure for."

The breadth difference becomes structural when you account for tier-gating:

If your product is narrowly scoped to one of Apideck's 9 core categories, the catalog comparison is closer. If your product spans categories, Unified.to's structural model is materially different.

AI and MCP: two real products, different positioning

Both Apideck and Unified.to operate MCP servers in 2026. The architectural and positioning differences matter more than the existence question.

Apideck MCP:

• Production-ready (not beta), MIT-licensed open-source
• Hosted endpoint at mcp.apideck.dev/mcp (HTTP/SSE)
• Self-hostable via npm (@apideck/mcp-server-crm) or the apideck-libraries/mcp GitHub repo
• Fronts Apideck's ~200+ connectors
• Positioned as one integration channel alongside Unify and Vault, not as a flagship product line

Unified MCP:

• Managed, multi-region endpoints (US, EU, AU)
• 446+ integrations and 22,000+ callable tools across normalized schemas with passthrough access
• Compatible with Anthropic, OpenAI, Google Gemini, Cohere, Grok, Groq, and other MCP-compatible clients
• Positioned as a named flagship product on Unified.to's homepage, dedicated landing page, and product navigation

Both can technically serve AI agent workflows. The choice is between open-source flexibility plus self-hosting (Apideck) versus broader managed coverage plus multi-region endpoints plus flagship product investment (Unified.to). For teams that want full control of the MCP runtime and don't need the broader category coverage, Apideck's open-source approach is genuinely useful. For teams that want managed multi-region MCP across the largest published integration catalog, Unified MCP fits better.

Developer experience

Security and compliance

For mid-market and enterprise buyers running formal security reviews, these gaps may extend the procurement process for Apideck or push them toward Enterprise plans where the gating disappears but pricing is sales-led.

Pricing model comparison

The pricing story isn't about headline numbers — it's about what each plan includes.

Apideck Launch — $599/month

• 25 consumers
• 1 unified API category
• Vault with "customizable" UI (Apideck branding remains)
• Business Hours Support
• 30-day free trial with up to 2,500 API requests for testing

Apideck Scale — $1,299/month

• 100 consumers
• 3 unified API categories
• Custom Field Mapping
• Business Hours Support

Apideck Enterprise — custom

• 300+ consumers
• Unlimited categories
• Whitelabel Vault (full removal of Apideck branding)
• SSO
• Configurable log retention
• Enterprise SLA

Unified.to Grow — $750/month

• 750,000 API calls
• All 26+ categories
• Unlimited customer connections
• Private Slack/Discord channel with <2 hr response SLA in business hours
• 30-day free trial available

Unified.to Scale — $3,000+/month

• 6 million API calls
• All 26+ categories
• SAML SSO, customer-managed secrets, HIPAA BAAs
• Multi-region MCP endpoints (US/EU/AU)
• Private Slack/Discord channel with <1 hr business-hours response, <12 hr non-business-hours SLA
• Sales-led ("book a demo" entry)

Unified.to Enterprise — custom

• All 26+ categories
• Single tenant / private cloud / dedicated cloud / on-prem deployment options
• Enterprise-ready infrastructure and SLAs, customized
• Book a demo

The decisive comparison for multi-category products:

Customer spotlight: Interstellar Labs

Interstellar Labs builds AI agents for mid-market and enterprise companies, orchestrating workflows across fragmented SaaS stacks. As they moved upmarket, integrations became a blocker to growth — every enterprise demo hit the same wall: "Does it work with Greenhouse?" "We use NetSuite, not QuickBooks." "Our entire sales team is on Pipedrive."

With two engineers building integrations in-house, ten weeks produced just two integrations (Salesforce and Slack), both already showing maintenance cracks. Meanwhile, a Fortune 500 telecom prospect required support for 50 different tools during the pilot.

In just three months, Interstellar Labs went from supporting two hand-built integrations to offering 300+ out-of-the-box — all through a single integration with Unified.to. Their team connected Unified.to's Python SDK with their Agent Development Kit, giving their AI agents real-time access to every supported integration across CRM, ATS, accounting, and messaging platforms.

"You know what is the best thing about Unified.to? It's boring! Like it just works and I can focus on actually building my stuff."

— Faisal Abid, CTO, Interstellar Labs

The Interstellar Labs case is directly relevant to the Apideck comparison. Their use case spans multiple categories simultaneously — CRM + ATS + accounting + messaging — for AI agents that need to act across them in real time. The combination of broad multi-category coverage on a single plan and a managed MCP runtime was the architectural fit, not the specific pricing or category boundary that would have constrained them on Apideck's tier structure.

How to choose

Choose Apideck if:

• Your product is built around an embedded integrations marketplace and Vault as a customer-facing surface
• Your category needs are concentrated in Apideck's 9 core unified APIs (or fewer)
• You want an open-source MCP server you can self-host
• Pay-per-consumer pricing aligns with your unit economics (especially if your customers connect multiple accounts each)
• You can absorb the tier-gating constraints (1 category on Launch, custom fields on Scale+, white-label on Enterprise)

Choose Unified.to if:

• Your product needs integrations across multiple categories on a single plan
• You're building AI features that need a managed multi-region MCP server
• Compliance posture requires customer-managed secrets, SAML SSO, or HIPAA BAAs
• You need EU or AU data residency for regulatory or customer requirements
• You want 26+ categories accessible from the entry tier
• Usage-based pricing scales more predictably for your customer × API call profile
• You need single-tenant, private cloud, dedicated cloud, or on-prem deployment options (Enterprise tier)

Both could work for: products that need pass-through architecture with no business data caching, products in 1–3 categories that fit within Apideck's Scale tier structure, products without strict EU residency or BYOK requirements, and teams that primarily care about specific category depth over breadth.

Buyer tip on data storage claims: both platforms market pass-through architectures with no customer payload data cached. Both still persist tokens, connection metadata, and operational logs. The meaningful differences during a security review are around what enterprise controls are available (SSO, RBAC, audit logs, BYOK, multi-region hosting), not the basic pass-through claim. Ask each vendor specifically what each tier includes.

For a deeper architectural breakdown, see Pass-Through vs. Sync-Based Unified APIs. For pricing-model implications at scale, see Usage-Based vs Per-Connection Pricing for Integrations.

Frequently asked questions

Are Apideck and Unified.to the same kind of product? Yes, architecturally — both are pass-through unified APIs that don't cache customer business data. They differ in coverage breadth (Apideck ~200+ connectors across 9 core unified APIs, Unified.to 446+ across 26+ categories), in product positioning (Apideck markets Vault as a primary embedded marketplace product; Unified.to positions broadly around embedded auth + SDKs + MCP), and in tier structure (Apideck gates categories per plan; Unified.to includes all categories on every plan).

Does Apideck offer MCP for AI agents? Yes. Apideck publishes an open-source MCP server under MIT license, available both hosted (mcp.apideck.dev) and self-hostable via npm or GitHub. It's production-ready and fronts Apideck's ~200+ connectors. Unified MCP is positioned as a flagship product with multi-region endpoints (US/EU/AU), 446+ integrations, and 22,000+ callable tools across normalized schemas. The choice between them depends on whether open-source self-hosting flexibility or managed multi-region coverage matters more for your AI use case.

Which is cheaper at scale? It depends on the category and customer × consumer × API call mix. For products in a single Apideck core category, Apideck Launch at $599/month for 25 consumers can be cheaper than Unified.to Grow at $750/month. For products needing two or more categories, Apideck's effective entry point is Scale at $1,299/month, while Unified.to's Grow at $750/month includes 26+ categories. Unified.to's Scale tier ($3,000+/month) adds SAML SSO, customer-managed secrets, HIPAA BAAs, and multi-region MCP endpoints. Both vendors gate enterprise features (SSO, BYOK, dedicated support, full white-label) to higher tiers.

Does Apideck store customer data? Apideck markets a pass-through architecture and doesn't cache business payload data. Per Apideck's own materials, they store OAuth tokens, API keys, connection metadata, and encrypted logs at rest — same baseline as any pass-through unified API. Apideck does not offer customer-managed secrets (BYOK); all encryption keys are managed via AWS Systems Manager Parameter Store. Unified.to offers customer-managed-secret options via AWS Secrets Manager, Azure Key Vault, Google Cloud Secrets Manager, and HashiCorp Vault on Scale tier and above.

How real-time is each platform? Both platforms route API calls directly to source systems at request time. For event delivery, Apideck's virtual webhooks poll providers without native webhook support "at an interval of every 24 hours" by default, with faster intervals available on higher pricing plans (specific cadences not publicly documented). Unified.to provides native webhooks where source providers support them, with managed change detection for sources that don't.

Is Unified.to a good Apideck alternative? Unified.to is a strong fit when your product needs multi-category integration breadth on a single plan, when AI/MCP is a primary product surface rather than a side feature, when compliance posture requires customer-managed secrets or multi-region hosting, or when you want SAML SSO without a sales-led Enterprise contract. It's a less natural fit if Apideck's Vault embedded marketplace UX is itself a primary product requirement — Unified.to provides embedded auth components but doesn't market a separate "integrations marketplace product" the way Apideck does with Vault.

Does Apideck publish a canonical integration count? No. Apideck's marketing language uses "200+" as an approximation. Per-category ranges are documented (e.g., 30+ Accounting connectors, 20+ CRM, 25+ HRIS) but not summed into a public total. Unified.to publishes 446+ integrations across 26+ categories on its pricing page.

Start your 30-day free trial of Unified.to or talk to our team to see how the coverage and architecture fit your product.