The AI-powered JustFill alternative
JustFill is a fast, credit-based AI form filler that reads any PDF — including scanned and flattened ones — and saves a reusable template so the same form refills in a click.
Quick answer
Filly AI is the best JustFill alternative when you fill forms for the same people again and again. JustFill is document-first — it remembers the form. Filly is client-first — it remembers the person, so any new form auto-fills from a saved profile. Filly also handles Word files, includes no-login e-signature, and its free plan includes real AI fills.
Where JustFill is strong
JustFill is genuinely quick on a single document and priced for occasional use: you buy credits rather than a seat, it handles scanned and non-fillable PDFs without Adobe, and detecting a form once makes every later refill of that same form near-instant.
Filly AI vs. JustFill at a glance
| Feature | Filly AI | JustFill |
|---|---|---|
| Free plan | Yes — 10 forms, 5 clients, 10 fills/mo, no card | Credit-based / pay-as-you-go |
| Reusable client profiles | Core feature — save a client once, reuse everywhere | Saved snippets rather than client profiles |
| Batch fill (many clients at once) | Yes — up to 20 per run, one ZIP | Yes |
| AI field extraction | Yes — reads any PDF/DOCX, incl. scanned (OCR) | Yes |
| No-login e-signature | Yes — share a link, sign in any browser | Not part of its flow |
| Starting paid price | $19/mo (Solo) | Credit-based / pay-as-you-go |
| Best for | Professionals refilling the same clients' details across many forms | Occasional one-off fills, priced per document |
Why teams switch to Filly
It remembers the client, not just the form
JustFill saves a template so the same form refills quickly. Filly saves the person — so a client's details flow into any form you upload next, even one you've never seen before.
Word documents, not just PDFs
Filly fills DOCX as well as PDF, which matters for contracts, engagement letters, and intake packs that never existed as a PDF.
E-signature is built in
Send a no-login link, the client signs in any browser, and the signed copy returns to you — no separate signing tool in the chain.
Free plan with actual AI
Filly's free plan includes 10 AI fills a month, so you can test the AI itself before paying — not just manual typing.
Try Filly free — no card
Fill your first forms today. 10 forms, 5 clients, 10 fills a month on the free plan.
Get startedFrequently asked questions
- What is the best JustFill alternative?
- Filly AI is a strong JustFill alternative for anyone filling forms for the same clients repeatedly. JustFill is built around the document; Filly is built around the client, saving each person's details once so every future form fills from that profile. Filly adds Word support, batch fill for up to 20 clients, no-login e-signature, and a free plan that includes real AI fills.
- How is Filly AI different from JustFill?
- The difference is what gets remembered. JustFill detects a form once and saves that form as a reusable template, which is fast when you refill the same document. Filly saves the client instead, so their details auto-fill into any form — including one you upload for the first time. Filly also covers Word files and includes e-signature.
- Is JustFill or Filly AI better value?
- It depends on your pattern. JustFill's credit-based pricing suits occasional, one-off documents where you only pay for what you use. Filly's flat plans (free to start, then $19/month) are more predictable when you fill regularly for a roster of clients, because volume doesn't change the price. Check both against your real monthly volume.
- Can Filly AI fill scanned PDFs like JustFill?
- Yes. Filly runs OCR on scanned documents, uses AI to find the fields, and flags anything it's unsure about for you to confirm before export — so scanned and flattened forms are supported.
Other comparisons
Comparison based on publicly available information as of 2026. Product names and trademarks belong to their respective owners; Filly AI is not affiliated with or endorsed by JustFill. Details change — verify current features and pricing on each provider's site.