Dev tools · alternatives · 2026
24 alternatives to Cassiopeia
Micro SaaS for easy and powerful PDF generation via API
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Cassiopeia launched in 2024; newer entries below may have overtaken it.
- 1PA
Hi HN, Arek here. We’re super excited to officially launch PSPDFKit API [1]. PSPDFKit API is a collection of HTTP APIs that enable you to convert, generate, and edit documents without running any service on your infrastructure. What differentiates our API from others is that you can chain together multiple “actions” as part of a single API request. For example, you can convert, OCR, watermark, edit, and flatten a document — all in one call. Available actions [2]: - PDF Generator - PDF Converter - Image Converter - OCR - Watermark - Merge - Split - Duplicate - Delete - Flatten Our…
2022 · its alternatives →
- 2
🤖 A Node queue API for generating PDFs using headless Chrome. Comes with a CLI, S3 storage and webhooks for notifying subscribers about generated PDFs - esbenp/pdf-bot
2017 · github.com · its alternatives →
- 3
- 4WB
Kalmia started as a small hobby project about two months ago, but it quickly evolved when we needed a better solution to manage our office's documentation. It has now become our go-to tool for both internal and user-facing docs. Recently, we decided to open source it, as we believe others might benefit from a lightweight, customizable documentation system like this. We're excited to see how the community can take it further, contribute, and adapt it to their own needs!
2024 · kalmia.difuse.io · its alternatives →
- 5
Anvil PDF API▲185Twilio for PDFs: esign, fill, generate PDFs with one API
2021 · useanvil.com · its alternatives →
- 6
Avenir▲68Generate docs from SF with minimal effort, in seconds
2023 · aveneer.forvendi.com · its alternatives →
- 7
The easiest way to programmatically populate any PDF
2020 · useanvil.com · its alternatives →
- 8
Documind is an open-source tool that turns documents into structured data using AI. What it does: - Extracts specific data from PDFs based on your custom schema - Returns clean, structured JSON that's ready to use - Works with just a PDF link + your schema definition Just run npm install documind to get started.
2024 · github.com · its alternatives →
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Free tool to extract tables from PDF and Images
2021 · docsumo.com · its alternatives →
- 14
100% bis 500 € + 200 Freispiele, 4.000+ Games, 24/7-Chat und blitzschnelle Auszahlungen. Teste Slots, Live-Tische und sichere Zahlungen bei Malina Casino.
2012 · docverter.com · its alternatives →
- 15TA
Hello HN! It kept surprising me how much of a hassle it is to generate a PDF with decent HTML5 rendering from my SaaS apps. I tried several free libs and APIs but ended up with botched rendering a lot of times. So I set out to simplify this chore by creating an AWS hosted HTML to PDF conversion API that's based on Chrome. This API will allow a dev to just send the HTML to our API and get a PDF in response without having to worry about running and managing Chrome somewhere in their infra. I just finished the first version of my landing page and hosted pdf generation API…
2018 · its alternatives →
- 16DI
2017 · docgen.io · its alternatives →
- 17
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A flexible Web API and template editor for PDF generation
2020 · pdfgeneratorapi.com · its alternatives →
- 20
Fast PDF document generation SaaS platform.
Aug 2026 · cellystial.com · its alternatives →
- 21
CxReports▲18Effortlessly transform complex data into pixel-perfect reports using our user-friendly interface and intuitive WYSIWYG editor. Try CxReports for free!
2025 · cx-reports.com · its alternatives →
- 22
- 23
Most products that touch PDFs or images quietly rebuild the same thing: a hacked-together “router” that picks which OCR/vision API to call, normalizes the responses, and prays the bill is sane at the end of the month. DocsRouter is that layer as a product: one stable API that talks to multiple OCR engines and vision LLMs, lets you route per document based on cost/quality/latency, and gives you normalized outputs (text, tables, fields) so your app doesn’t care which provider was used. It’s meant for teams doing serious stuff with documents: invoices/receipts, contracts,…
Dec 2025 · docsrouter.com · its alternatives →
- 24
Docuzina▲3document generation tool for business owners and freelancers
Aug 2026 · docuzina.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →