The interface test
Ask one question: who will press send on the first live piece? If the answer is a marketer, buy a dashboard. If the answer is a service account, buy an API.
That test is why this cluster has Sendvo vs Lob and Sendvo vs PostGrid as separate vs pages, not as one “API tools” list.
What each side must own
| Job | Dashboard (self-service) | API-only |
|---|---|---|
| Audience | Map, ZIP, upload, or niche lists in the product | Your database or CDP |
| Creative | Designer + proof in the browser | Template IDs and HTML/PDF you store |
| Cost preview | Campaign review before charge | You compute from the vendor rate card |
| Suppression | Product lists on paid plans | Your eligibility service |
| Retries | The vendor’s send UI | Idempotency keys you implement |
| Staff | Marketer or operator | Engineer plus on-call |
Where Postalytics sits
Postalytics is a dashboard with a published API on paid plans. It is not API-only. If you want CRM-triggered mail without building the endpoint layer, read Sendvo vs Postalytics.
Sendvo’s API is Growth-only. Postalytics lists a Direct Mail API on Free with more features on Marketer and Pro. That is a plan fact, not a quality ranking.
Where Lob and PostGrid sit
Lob publishes Developer through Enterprise plans and address-verification SKUs. PostGrid’s public pricing page is a demo request for Print & Mail API and address APIs. Neither replaces a designer or a map audience for a shop owner.
If you are an API buyer, compare those two on their own docs. This page will not invent a PostGrid piece rate.
A clean decision
- Person clicks send this month → dashboard. Start at the best self-service direct mail platform.
- Code clicks send this quarter → API. Start at Sendvo vs Lob or Sendvo vs PostGrid.
- You need both later → pick the dashboard you can launch now, and confirm the API is on a plan you will actually buy.
Related fee math: cheapest self-service direct mail.
Bottom line
Do not buy an API because it looks more serious. Buy the interface your team can run without a ticket queue.
FAQ
What is self-service direct mail?
A browser product where you pick recipients, design the piece, see cost, and send. Sendvo is this model. You do not need a developer for a first campaign.
What is API-only direct mail?
A print-and-mail API such as Lob or PostGrid. Your app stores recipients, builds the payload, and handles webhooks. The vendor prints what you send.
Can Sendvo do both?
Yes, but not on every plan. The dashboard is the default. API access is a Growth capability. Do not buy Sendvo as if it were an API-only platform.
When is an API the right first purchase?
When mail is a feature of your product, you already have recipient data, and an engineer can own retries, idempotency, and templates.