Whether you’re a SaaS founder, product manager, or part of the customer success team, one thing is non-negotiable — customer data privacy. If your users don’t trust how you handle data, especially when integrating with third-party tools, it can derail deals and erode trust.
Unified APIs have changed the game by letting you launch integrations faster. But under the hood, not all unified APIs work the same way — and Kombo.dev and Knit.dev take very different approaches, especially when it comes to data sync, compliance, and scalability.
Let’s break it down.
What is a Unified API?
Unified APIs let you integrate once and connect with many applications (like HR tools, CRMs, or payroll systems). They normalize different APIs into one schema so you don’t have to build from scratch for every tool.
A typical unified API has 4 core components:
- Authentication & Authorization
- Connectors
- Data Sync (initial + delta)
- Integration Management
Data Sync Architecture: Kombo vs Knit
Between the Source App and Unified API
- Kombo.dev uses a copy-and-store model. Once a user connects an app, Kombo:
- Pulls the data from the source app.
- Stores a copy of that data on their servers.
- Uses polling or webhooks to keep the copy updated.
- Knit.dev is different: it doesn’t store any customer data.
- Once a user connects an app, Knit:
- Delivers both initial and delta syncs via event-driven webhooks.
- Pushes data directly to your app without persisting it anywhere.
- Once a user connects an app, Knit:
Between the Unified API and Your App
- Kombo uses a pull model — you’re expected to call their API to fetch updates.
- Knit uses a pure push model — data is sent to your registered webhook in real-time.
Why This Matters
| Factor | Kombo.dev | Knit.dev |
|---|---|---|
| Data Privacy | Stores customer data | Does not store customer data |
| Latency & Performance | Polling introduces sync delays | Real-time webhooks for instant updates |
| Engineering Effort | Requires polling infrastructure on your end | Fully push-based, no polling infra needed |
Authentication & Authorization
- Kombo offers pre-built UI components.
- Knit provides a flexible JS SDK + Magic Link flow for seamless auth customization.
This makes Knit ideal if you care about branding and custom UX.
Summary Table
| Feature | Kombo.dev | Knit.dev |
|---|---|---|
| Data Sync | Store-and-pull | Push-only webhooks |
| Data Storage | Yes | No |
| Delta Syncs | Polling or webhook to Kombo | Webhooks to your app |
| Auth Flow | UI widgets | SDK + Magic Link |
| Monitoring | Basic | Advanced (RCA, reruns, logs) |
| Real-Time Use Cases | Limited | Fully supported |
Tom summarize, Knit API is the only unified API that does not store customer data at our end, and offers a scalable, secure, event-driven push data sync architecture for smaller as well as larger data loads.By now, if you are convinced that Knit API is worth giving a try, please click here to get your API keys. Or if you want to learn more, see our docs
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