Adobe PDF Services (Acrobat Services APIs) and RelayPDF are both hosted document APIs. They are not substitutes for the same job. Adobe is a Document Cloud toolkit: OCR, Document Generation from Word templates, PDF Extract, accessibility auto-tag, electronic seal, Office export, and page operations. RelayPDF is a prepaid Chromium printer with Handlebars templates, PDF tools, and a first-party MCP server.
If you need an Adobe PDF Services alternative, start with the feature table. Adobe wins OCR, Document Generation, Extract, and enterprise billing. RelayPDF wins a prepaid Chromium POST and first-party MCP. Neither page invents ratings.
See the feature table first, then billing. Public pages below are dated 23 August 2026.
Feature table
Public pages as of 23 August 2026. Yes means the vendor documents the capability. Gaps are labeled as not advertised, not as a secret missing feature.
| Capability | RelayPDF | Adobe PDF Services |
|---|---|---|
| HTML to PDF | Yes. POST /v1/pdf, html as UTF-8 JSON (not Base64). Chromium. printBackground default true. Timeout max 60s. | Yes. HTMLToPDF / Create PDF. Zip with index.html, inline-CSS HTML, HTTPS URL, or dynamic HTML plus dataToMerge. OAuth plus asset upload. HTTPS only; non-routable hosts rejected. |
| URL to PDF | Yes. Public http(s) only. Private, loopback, metadata rejected. extraHTTPHeaders and cookies on url fetches (docs/options). | Yes. HTML specified via URL. HTTPS required. Non-routable IPs rejected, including after redirects. |
| Markdown to PDF | Yes. GFM Markdown on the same /v1/pdf endpoint. | Create PDF lists Markdown among Office-adjacent create formats. Not the HTMLToPDF hero path. |
| Office to PDF | Yes. POST /v1/convert (LibreOffice). | Yes. Create PDF from Word, Excel, PowerPoint, text, images. Export PDF back to Office and images. |
| Templates | Yes. Handlebars draft, publish, templateId plus templateData. Gallery at /pdf-templates. AI generate 0.05 USD on success. | Document Generation API: Word templates with tags plus JSON, output PDF or Word. Separate from HTMLToPDF. |
| OCR | Not advertised. /v1/pdf/text is not OCR. | OCR PDF operation. Input application/pdf. Locales and SEARCHABLE vs EXACT types documented. |
| PDF/A | Not advertised. | PDF Properties reports compliance levels (docs name PDF/A and PDF/UA). Current howtos and licensing table do not list a convert-to-PDF/A job. |
| MCP / agents | Yes. First-party stdio MCP via @relaypdf/cli. Use-case /use-cases/agents. | Not advertised. REST plus Java, .NET, Node, Python SDKs. Power Automate and UiPath connectors. |
| Prepaid / billing | Prepaid wallet. HTML/URL/MD/template PDF 0.015 USD. Failures not billed. Credit never expires. 5 USD signup, no card. | 500 Document Transactions per month free. Paid via sales (ETLA/VIP). No public per-call dollar price. 25 RPM free / 100 RPM enterprise. |
What each product actually is
Adobe Acrobat Services is five APIs on the overview page: PDF Services, PDF Embed (free viewer), Document Generation, PDF Extract, and Accessibility Auto-Tag. Extract and Auto-Tag ship with paid PDF Services. PDF Services includes create, htmltopdf, OCR, combine, split, compress, protect, watermark, linearize, page edit, form data import/export, electronic seal, and PDF properties. Auth is a service principal: client id, client secret, bearer token, upload an asset, poll a job. Regions: US default, EU (Ireland) on paid credentials.
RelayPDF is a managed Chromium API first. POST https://api.relaypdf.com/v1/pdf accepts exactly one of html, url, markdown, or templateId. Office and wkhtmltopdf go to POST /v1/convert. Merge is POST /v1/pdf/merge. One bearer key covers REST, SDKs, CLI, and MCP. Response modes: binary (default), url (24-hour download), or async plus optional callbackUrl.
Adobe HTML to PDF is a Create-family job with pageLayout and waitTimeToLoad. It is not a drop-in Chromium print API. RelayPDF options match Chromium print names (format, printBackground, waitUntil, headerTemplate). That is the product thesis: print CSS you already own.
Where Adobe wins
OCR. Official howto POSTs to https://pdf-services.adobe.io/operation/ocr. Overlay a searchable text layer; EXACT keeps the original image. RelayPDF does not ship OCR. If the inbox is scans and faxes, Adobe is the documented path.
Document Generation. Word template plus JSON in, PDF or Word out. Adobe documents contracts, invoices, proposals, and branded marketing docs on that API. RelayPDF templates are HTML/Handlebars printed by Chromium. If legal or finance already authors in Word with Adobe tags, stay there.
PDF/A as metadata. Get PDF Properties documents compliance levels, with PDF/A and PDF/UA named as examples. That is inspection, not a conversion listed on the current howtos or the licensing operation table. Do not treat RelayPDF as a PDF/A writer either.
Sensei extract and accessibility. Extract returns structured JSON, table CSV/XLSX, and figure PNGs from native or scanned PDFs. Auto-Tag adds structure tags; Adobe states the output is not guaranteed WCAG or PDF/UA without further work. Electronic seal is 10 Document Transactions per PDF. RelayPDF has none of these.
Envelope and enterprise paper. Licensing: 100 MB files, combine family cap 20 documents, JSON payload 10 MB. Free tier 500 Document Transactions per month; most operations are 1 transaction per 50 pages (Extract 1 per 5 pages). Paid quota is a written agreement. Embed is a real in-app viewer. Power Automate and UiPath are first-party. RelayPDF is a smaller prepaid API.
Where RelayPDF wins
One PDF route. HTML, public URL, GFM Markdown, and Handlebars templates share POST /v1/pdf. printBackground defaults to true. Formats include letter, legal, tabloid, ledger, A0-A6. waitUntil defaults to networkidle0. Timeout 60s. Failed renders are not billed.
Prepaid wallet. Live card at https://relaypdf.com/pricing: HTML/URL/Markdown/template PDF or screenshot 0.015 USD; LibreOffice 0.04; wkhtmltopdf 0.025; tools 0.005; AI template generate 0.05. Failed, invalid, unauthorized, rate-limited, and convert_unavailable never debit. Credit never expires. Top-up bonuses 5/6/10/15 percent. Adobe public price is 500 free transactions, then sales. You cannot quote a unit dollar from their pricing page.
PDF tools. RelayPDF: merge (2-20), extract, AES-256 protect, stamp, rotate, compress, info, text (no OCR), AcroForm fill, barcodes, zip at 0.005 USD. Adobe page ops are richer (split, insert, replace, reorder, linearize, watermark, form data import/export) and billed as Document Transactions.
Agents. First-party MCP and CLI cover pdf, image, convert, tools, templates, and jobs. Setup is relaypdf setup then npx @relaypdf/cli mcp. Docs: https://relaypdf.com/docs/mcp. Use-case: https://relaypdf.com/use-cases/agents. Adobe SDKs are for application code, not an MCP host.
Auth, not engines
Adobe HTML to PDF wants an uploaded zip or HTML asset, OAuth, and a poll. RelayPDF accepts a JSON body with html and writes application/pdf. Formats: letter, legal, tabloid, ledger, a0-a6. waitUntil: load, domcontentloaded, networkidle0, networkidle2. Timeout max 60000 ms.
LibreOffice is RelayPDF Office convert at 0.04 USD. Adobe Create PDF from Office is a Document Transaction (1 per 50 pages for most tools). Compare real files; do not assume either engine is Acrobat.
When to use which
### Stay on Adobe when
- You need OCR, Extract, Auto-Tag, electronic seal, or PDF-to-Office export.
- Authors already maintain Word Document Generation templates.
- You need US/EU processing choice, 100 MB files, or an ETLA/VIP purchase path.
- Embed, Acrobat Sign adjacency, Power Automate, or UiPath is the integration, not a curl printer.
- You must inspect PDF/A or PDF/UA compliance on existing files via PDF Properties.
### Move to RelayPDF when
- You want one POST /v1/pdf for HTML, URL, Markdown, and templates, with Chromium print options and binary by default.
- You need AcroForm fill, stamp, or the rest of the $0.005 tool set in the same key as render.
- Coding agents should call a first-party MCP server instead of wrapping REST.
- You want prepaid cents per successful document and a ledger that never bills failures.
Do not rip out a working Adobe job that OCRs a 50-page scan. Port one real HTML document and compare CSS, not slide decks.
Limits (both)
RelayPDF: public URLs only, 60s Chromium timeout, 15 MB tool inputs, merge 2-20, funded 60 writes / minute. /v1/pdf/text is not OCR. No PDF/A, e-sign, HIPAA, or SLA claims here.
Adobe: OAuth plus asset workflow, 100 MB / 20-document combine family, 25 RPM on free tier, paid credentials required for EU routing. HTML URL fetch is HTTPS and must not resolve to a non-routable IP. Auto-Tag is not a compliance certificate. Paid price is not on the public rate card.
Links
| Product: | https://relaypdf.com/html-to-pdf |
|---|---|
| Pricing: | https://relaypdf.com/pricing |
| Sibling: | https://relaypdf.com/compare/wkhtmltopdf |
| Docs: | https://relaypdf.com/docs/pdf |
Adobe overview page (developer.adobe.com document-services docs overview)
Adobe PDF Services API page (developer.adobe.com document-services apis pdf-services)
Adobe OCR howto, Document Generation overview, PDF Properties, licensing, and pricing/main on developer.adobe.com
Read HTML to PDF, the wkhtmltopdf compare for engine choice, and the PDF docs for field names.
https://relaypdf.com/html-to-pdf
https://relaypdf.com/docs/pdf
https://relaypdf.com/docs/templates
https://relaypdf.com/docs/mcp
https://relaypdf.com/docs/options
https://relaypdf.com/pricing
https://relaypdf.com/pdf-templates
https://relaypdf.com/use-cases/agents
https://relaypdf.com/compare/wkhtmltopdf
https://developer.adobe.com/document-services/docs/overview/
https://developer.adobe.com/document-services/apis/pdf-services/
https://developer.adobe.com/document-services/docs/overview/pdf-services-api/howtos/ocr-pdf
https://developer.adobe.com/document-services/docs/overview/document-generation-api/
https://developer.adobe.com/document-services/docs/overview/pdf-services-api/howtos/pdf-properties
https://developer.adobe.com/document-services/docs/overview/pdf-services-api/dcserviceslicensing/
https://developer.adobe.com/document-services/pricing/main/