§ Api2Pdf alternative

Api2Pdf Alternative: When Metered Compute Stops Being Simple

Api2Pdf has the cheapest usage based floor in the category and no request limits. If raw price per file is the whole decision, it is genuinely hard to beat. Teams look elsewhere when they want predictable billing, a modern engine by default, and a record of what they rendered.

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§ Short answer

The reasons to want an Api2Pdf alternative are predictability, engine, and records. Api2Pdf is pay as you go, billed on compute seconds and bandwidth per megabyte, which is very cheap but hard to forecast, and its low cost path leans on wkhtmltopdf, an engine archived in 2023 with an unpatched high severity flaw. It also drops generated files after 24 hours and keeps no dated record of the source page. Sitepdf runs managed Chromium by default, prices per render, and can archive a timestamped snapshot from the same call. If you want the cheapest possible floor and can live with metered billing, Api2Pdf wins on price.

Last updated July 2026. Written and fact checked by the Sitepdf team.

§ 00

Api2Pdf and Sitepdf, compared honestly

Api2Pdf figures are from api2pdf.com pricing, read on 19 July 2026. Sitepdf figures are planned launch pricing, labelled planned because the API is in early access. Check both pricing pages for current numbers.

	Api2Pdf	Sitepdf
Pricing model	Pay as you go: $1/mo base plus metered compute and bandwidth	Per render, flat plan
Metered rate	Roughly $0.001 per MB bandwidth plus a per second compute charge	One price per render, no compute meter
Rendering engines	wkhtmltopdf, headless Chrome, LibreOffice, you choose	Managed Chromium, one modern engine
Default engine risk	The cheap path is wkhtmltopdf, archived since 2023	None; Chromium is current and maintained
File retention	Generated files dropped after about 24 hours	archive=true keeps a snapshot with retention you control
Timestamped record of the source page	No	Yes. archive=true on any render.
Request limits	None advertised	Plan based, generous
Status	Shipped, developer focused	Early access. We say so plainly.

Api2Pdf is an honest, developer first product and its price floor is real. This page is about the tradeoffs that come with metered billing and an engine menu that includes a dead one.

§ 01

Where Api2Pdf wins, plainly

On price at the floor, Api2Pdf is the one to beat. The pay as you go model means you pay for what you render and nothing more, there is a free path to get started, and there are no request caps or queues to design around. For a side project, a low volume internal tool, or a spiky workload where a monthly floor would be wasted, that shape is exactly right. It also supports large output, into the gigabytes, which most fixed plans throttle.

If your priority is the lowest possible bill and you are comfortable owning the tradeoffs below, use Api2Pdf. We would rather tell you that than pretend a $29 plan beats a few cents a month for a handful of files.

§ 02

Metered billing is cheap until it is a spreadsheet

Compute seconds plus bandwidth per megabyte is a fair model, but it trades a predictable number for a variable one. A heavy JavaScript page that takes four seconds to settle costs more than a static one that renders instantly, and a large image rich PDF costs more to deliver than a lean invoice. At low volume the total is trivial. At scale, or when you need to quote a fixed monthly cost to a finance team, a meter that moves with page complexity is harder to defend than a flat per render price. Neither is wrong; they suit different buyers.

§ 03

The cheap engine is an archived one

Api2Pdf lets you pick the engine, and the cheapest, fastest path is wkhtmltopdf. That engine was archived by its maintainers in 2023 and carries a high severity SSRF vulnerability that will never be patched, on top of a frozen feature set with no CSS grid and shaky flexbox. We lay out the full picture, and the per stack replacements, in our wkhtmltopdf alternative breakdown. Api2Pdf also offers a headless Chrome path, which fixes the fidelity and security problem but changes the price and the speed. Sitepdf runs managed Chromium as the only engine, so you do not choose between cheap and current: modern rendering is the default.

§ 04

Files that vanish, and pages with no record

Api2Pdf hosts your generated file for roughly 24 hours and then removes it, which keeps their storage costs down and yours at zero. The consequence is that your application must capture the file immediately, and there is no dated record anywhere of what the source page contained at render time. For an ephemeral download that is fine. For anything a customer, auditor, or regulator might ask about later, it is a gap.

Sitepdf makes the record an option on the render you were already doing. Add archive=true and the page is stored as a timestamped snapshot under your account with retention you control, retrievable long after the PDF itself has moved on. If your source is a live URL, the URL to PDF API covers that path, and the seven tool comparison places both vendors in the wider field.

The Sitepdf call: modern Chromium render plus an optional dated record, priced per render.

curl https://api.sitepdf.com/v1/render \
  -H "Authorization: Bearer $SITEPDF_KEY" \
  -d url="https://example.com/report" \
  -d format=Letter \
  -d archive=true

{
  "pdf_url": "https://api.sitepdf.com/v1/documents/doc_5tk81.pdf",
  "archive": {
    "id": "arc_q90ab",
    "captured_at": "2026-07-19T10:41:07Z",
    "retrieve_url": "https://api.sitepdf.com/v1/archives/arc_q90ab"
  }
}

The API is in early access; this is the documented call shape it opens with. Full request and response walkthrough.

§ 05

Questions about this job

How much does Api2Pdf cost?

Api2Pdf is pay as you go: a $1 a month base plus metered usage of roughly $0.001 per MB of bandwidth and a small per second compute charge, with no request limits and a free path to start. Your bill scales with how heavy your pages and files are. Figures read from api2pdf.com on 19 July 2026; check their pricing page for current numbers.

What engine does Api2Pdf use?

You choose: wkhtmltopdf, headless Chrome, or LibreOffice. The cheapest and fastest path is wkhtmltopdf, which was archived in 2023 and has an unpatched SSRF vulnerability, so for modern CSS and security the headless Chrome path is the safer pick, at a different price. Sitepdf runs managed Chromium as its single engine.

Does Api2Pdf store my PDFs?

Only briefly. Api2Pdf hosts the generated file for about 24 hours, then removes it, so your application must download it promptly. There is no dated snapshot of the source page kept for later. If you need a timestamped record of what you rendered, that is the specific gap an alternative like Sitepdf fills with archive=true.

What is the best Api2Pdf alternative?

If you want predictable per render billing and a modern engine by default, Sitepdf. If you need a timestamped record of the page you rendered, Sitepdf or Urlbox. If you want a mature fixed plan with a big free tier, PDFShift. The right pick depends on whether price, predictability, or provenance matters most; our seven tool comparison lays out all of them.

Is metered PDF billing cheaper than a monthly plan?

At low or spiky volume, usually yes: you pay only for the files you render, so a handful of documents a month costs cents. At steady scale, a flat per render plan is easier to forecast and often cheaper per document once compute and bandwidth on heavy pages add up. Estimate both against your real monthly volume before deciding.

§ Index

More PDF and archiving tools

§ Early access

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The API opens to the list first, in order. Early access locks the planned launch rates for 12 months. No card required, launching soon.