thirds.ai vs APITemplate.io
thirds.ai is an APITemplate.io alternative where the AI builds the design for you. Describe it in a sentence, or upload a picture of a report you already send, and you get an editable design in your logo, colours, and fonts. From then on, ChatGPT, Claude, or your own code makes each PDF or image for one credit. One design makes both the PDF and the image, so you don't build a PDF template in one editor and an image template in another.
We aren't connected to APITemplate.io. APITemplate.io is a trademark of its owner.
Watch the comparison
APITemplate.io alternative: the AI builds your PDF and image template
Read the transcript
Looking for an APITemplate.io alternative? In thirds.ai, the AI builds the design for you, and one design makes both your PDF and your image.
Both tools fill a saved template with your data, and send back PDFs and images through an API. The big difference is who builds the design.
Meet Renata. Every month, she builds her investor update by hand, then makes it again as an image to share. Both files are called final.
So she takes a picture of September's update, uploads it, and picks her brand kit. Or you can describe yours in a sentence. The AI rebuilds it as a design she can edit, in her logo, colours, and fonts, with a field for every number that changes. And a change is one message in the chat.
APITemplate.io says you build PDF templates in its editors, and image templates on a separate canvas. Here, it's one design for both.
Now she asks Claude for October's update with the new numbers. The PDF comes back in her brand, and the image comes from the same design. And when nobody's at the screen, her own code sends the same data to the API.
November. December. January. Same design, new numbers, both files.
To be fair, APITemplate.io is the better pick for a ready link to Airtable, Bubble, or Power Automate, or for PDFs from a web page or Markdown. And if you only make PDFs, its PDF-only plan costs less per file.
Next month's update? One message. Start free at thirds.ai.
- 1 credit
- makes 1 PDF or image
- 50 credits
- free every month, no card
- $29
- a month for Starter, with 2,500 credits
- 4 formats
- PDF, PNG, JPEG, and WebP
Feature by feature
What's different
| What you need | thirds.ai | APITemplate.io |
|---|---|---|
| Inputs | Describe it to the AI, paste your own HTML, or upload a picture that becomes a design you can edit. Your code can also send plain HTML without saving a design. | PDF templates made in an HTML or visual editor, raw HTML, a reachable URL, or Markdown. Image templates are made in a drag-and-drop editor (vendor claim). |
| Outputs | PDF, PNG, JPEG, and WebP. | PDF, PNG, and JPEG on the product and API pages we read (vendor claim). |
| Template editing | A visual editor and an AI chat work on the same HTML design. | Separate HTML and visual editors for PDFs, plus a canvas editor for images with text, images, shapes, QR codes, and barcodes (vendor claim). |
| Brand kits | Save your logo, colours, and fonts once, or build the kit from your website, then put them on any design in one step. | You set fonts, colours, and logo images on each template in its editors (vendor claim). We did not find a saved brand kit that applies them across templates (our reading). |
| API and MCP | A REST API at /v1/pdf, /v1/image, and /v1/templates, plus an MCP server for AI agents. | A v2 REST API with regional endpoints, sync and async generation, webhooks, direct image URLs, and official SDKs for several languages (vendor claim). We found no product MCP server in the docs we read (our reading). |
| Integrations | The web app, the API, and MCP. A Zapier app and a Make app that you join from an invite link, and an n8n community node. | Zapier, Make, n8n, Airtable, Bubble, Power Automate, Pipedream, Integrately, and other ready links (vendor claim). |
| Pricing model | One credit makes one PDF or image. Starter is $29 a month for 2,500 credits. Extra credits cost $0.015 each on a paid plan, and packs start at $10 for 500 credits. | One successful PDF or image costs one generation, and a multi-page PDF still costs one (vendor claim). Monthly PDF Basic is $24 for 3,000 PDFs, and the image-and-PDF Starter plan is $35 for 1,500 files and 15 templates (vendor claim). |
| Free tier | 50 free credits a month for a verified account, no card. Making a design with AI or from a picture costs 50 credits, so a free month covers one AI design, or 50 files from a gallery design. | 50 PDF or image generations each month, three templates, API access, and selected integrations, with no card (vendor claim). |
| Where it fits | Teams that want the AI to build each design in their brand, from a sentence or a picture, and ChatGPT, Claude, or their own code to make each file. | Teams that want a ready no-code connection or several PDF input methods, with separate editors for PDF and image work (our judgment). |
Pricing
What does APITemplate.io cost compared with thirds.ai?
The cheaper tool depends on how many files you make each month and what kind they are. Here's what APITemplate.io and thirds.ai each cost, and how each one counts a file.
- In October 2026, APITemplate.io costs $35 a month for 1,500 PDFs and images on its Starter plan, and thirds.ai Starter costs $29 a month for 2,500 credits. One credit makes one PDF or image. APITemplate.io also has a PDF-only plan at $24 a month for 3,000 PDFs. It costs less per file when you only make PDFs. Paid yearly, those two APITemplate.io plans cost $29 and $19 a month (vendor claim). Prices can change, so check the APITemplate.io pricing page and our pricing page before you decide.
- One thirds.ai credit makes one PDF of up to 100 pages, or one image. The AI uses credits too. It costs 50 to build a new design or rebuild one from a picture, and 25 for a later text or HTML edit. A later message with a new picture costs 50 credits. Making or remaking an AI image also costs 50 credits. A file that fails costs nothing. See credits and billing.
- APITemplate.io says one successful PDF or image uses one generation, and a multi-page PDF still uses one. Unused generations do not roll over (vendor claim).
- On the free plans, you get 50 generations a month from APITemplate.io and 50 credits a month from thirds.ai, so a free month on thirds.ai covers one AI design or 50 files.
Where thirds.ai wins
The AI builds the design for you
In APITemplate.io, you build each PDF template in its HTML or visual editor, and each image template on its drag-and-drop canvas (vendor claim, checked 12 October 2026). In thirds.ai, you describe the report or the post in a few sentences, or upload a picture of one you already send, and the AI builds it as an editable design in your logo, colours, and fonts.
The AI adds a field for each detail that changes, so you don't mark the fields yourself. Try it on the AI template generator, or turn a picture into a template.
Where thirds.ai wins
Your brand on every design in one step
Save your logo, colours, and fonts once as a brand kit, or type your website address and thirds.ai builds the kit for you. Pick the kit on any design, and every PDF and image from it comes out in your brand.
In APITemplate.io, you set the fonts, colours, and logo on each template in its editors, one template at a time (our reading, 12 October 2026). That's fine for one invoice template, and tedious for twenty.
Where thirds.ai wins
Ask ChatGPT or Claude for the finished file
Connect thirds.ai to ChatGPT, Claude, Gemini, Grok, or any other AI you use. Then ask for this month's report with the new numbers, and the finished PDF comes back in your brand. Your assistant can write the summary too.
APITemplate.io connects to your code and to no-code tools through its REST API and ready links, and we found no connector for AI assistants in the docs we read (our reading, 12 October 2026). And when no one is at the screen, your automations make the same files through the API, webhooks, or Zapier, Make, and n8n.
No code needed
How do you make a client report in the thirds.ai editor?
You make a client report in the thirds.ai editor by starting from a designer-made report and typing this month's numbers into the boxes beside it. The report changes as you type, and a free account is enough.
- Open the Campaign results report template and click Use this template.
- Type the period, the result, the summary, and the next step into the boxes. The report changes as you type.
- Click Save and export PDF to download it.
Save your logo, colours, and fonts once as a brand kit, and put them on any design in one step. When you're ready to send the details from your own code, the template data guide shows the request.
Switching
Moving from APITemplate.io
You move from APITemplate.io to thirds.ai one template at a time, and you need one saved template and one real row of details to start. An APITemplate.io PDF call puts template_id in the query and sends template values in the JSON body. Its image call sends an overrides list keyed by element name (APITemplate.io API docs, checked 12 October 2026). thirds.ai sends template_id, a data object, and an exact version to pin the design, to either /v1/pdf or /v1/image. Save the returned job ID, then poll it or use a signed webhook until the file is ready.
For an HTML PDF template, copy the HTML and CSS into the template editor. APITemplate.io PDF templates use Jinja2 (vendor docs, checked 12 October 2026), and thirds.ai uses MiniJinja. They share the variable, loop, and condition syntax, but their filters can differ. Check every field and page break. For a canvas image, export a PNG and use Image to template, then correct the rebuilt layout before you save it. Follow Use templates with your data to add the schema and fixed version.
Checked and dated
Sources
We checked APITemplate.io's features and prices on 12 October 2026. Numbers marked (vendor claim) come from APITemplate.io. Where we say which tool fits, or that we didn't find a feature, that's our opinion.
- APITemplate.io pricing, checked 12 October 2026
- APITemplate.io subscriptions and credits, checked 12 October 2026
- APITemplate.io first template guide, checked 12 October 2026
- APITemplate.io ways to make a PDF, checked 12 October 2026
- APITemplate.io image generation, checked 12 October 2026
- APITemplate.io integrations, checked 12 October 2026
- APITemplate.io REST API, checked 12 October 2026
- APITemplate.io social media use case, checked 12 October 2026
- thirds.ai facts come from our pricing page, API reference, and billing guide.
Free to try
Make your first file free
Open the Campaign results report design, type in last month's numbers, and download the PDF free. A developer can then use the template data guide to make the next PDF from code.
Start from a designer-made template and download a real file for free. Sign up, and ChatGPT or Claude can make the next one in your brand.