Indigo e-Sign vs Adobe Acrobat Sign: E-Signatures With AI Review, Without the PDF Suite
Adobe Acrobat Sign is a genuinely capable e-signature tool. But here's the thing most comparisons skip: it isn't
really sold as an e-signature tool. It's sold as part of Acrobat — Adobe's PDF editing suite — and the signing
comes bundled in. That's brilliant if you already live in Acrobat all day. It's a lot of software to pay for if
all you actually wanted was to get a contract reviewed and signed.
So this comparison comes down to a simple question: do you need the PDF empire, or do you need signing
plus a smart read of the document? If it's the second, keep going.
How Adobe prices signing, and where it pinches
Adobe's e-signature capability is spread across individual Acrobat plans, per-user team plans, and a separate, sales-quoted Acrobat Sign Solutions tier for enterprises. The entry individual plan is modest, but two things catch small teams out:
⚠️ Transaction caps
The cheaper Standard for Teams plan limits each user to roughly 150 e-signature transactions a year — about a dozen a month. Go over, and there's no simple overage; you're routed to a custom enterprise quote.
🔒 Gated features
API access and the advanced authentication most growing businesses eventually want live on the enterprise Acrobat Sign Solutions tier, not the off-the-shelf plans. And month-to-month billing costs meaningfully more than the annual commitment.
None of that is hidden or unfair — it's just built for a buyer who wants the whole Adobe document stack. If that's not you, you're paying per seat for PDF tools you may never open as an Adobe Sign alternative.
What Indigo e-Sign does instead
Indigo e-Sign is the narrower, simpler tool on purpose. One flat price per account rather than per user. Unlimited documents on Pro, with no transaction ceiling to watch. And AI-powered e-signature document review built into every plan, including the free one — it reads your agreement and flags the key dates, payment terms, obligations and unusual clauses before you send it out.
You don't get a full PDF editor, OCR, or file conversion. You get review and signing in one place, at a price you can read off the page. For a lot of freelancers and small teams, that's the whole job. Explore Indigo e-Sign Features →
Indigo e-Sign vs Adobe Acrobat Sign at a glance
Detailed breakdown of features, pricing structures, limits, and capabilities
| Feature / Attribute | Indigo e-Sign ⭐ | Adobe Acrobat Sign |
|---|---|---|
| What it is | AI review + e-signature | PDF suite with e-signature bundled in |
| Pricing model | Flat, per account | Per user, inside an Acrobat subscription |
| Entry paid plan | $19/mo (or $15 annually) | Acrobat Standard ~$12.99/mo (individual) |
| Unlimited documents | ✓ Yes, on Pro | ❌ No — Standard for Teams caps ~150 e-sign/user/yr |
| Overage handling | No cap on Pro | Exceed the cap → custom enterprise quote |
| AI document review | ✓ Included from the free plan | AI Assistant (PDF-focused) on higher tiers |
| API access | ✓ Yes, on Pro | Enterprise tier (Acrobat Sign Solutions) only |
| Permanent free plan | ✓ Yes — 5 docs/month | Free Reader; sending needs a paid Acrobat plan |
| Signers need an account | No | No |
| Best suited to | Teams wanting review + signing, no PDF suite | Teams already living in Acrobat / Creative Cloud |
Where Adobe is the better choice
Worth saying plainly. Adobe wins when the PDF suite is the point, not overhead.
- You already pay for Acrobat Pro for PDF editing — in which case the signing is effectively free, and switching tools would be a step backwards.
- You need serious PDF work: OCR, conversion, form creation, redaction, all tightly integrated with Microsoft 365.
- You're standardised on Adobe across the business and value one vendor for documents end to end.
If that's your situation, stay with Adobe. Indigo isn't trying to be a PDF editor.
Where Indigo e-Sign wins
Ideal if you are seeking a cheaper Adobe Sign for small business and solo professionals:
- You want signing plus AI review, and don't need a full PDF suite wrapped around it.
- Per-user pricing and annual transaction caps feel like enterprise pricing for small-team needs.
- You'd rather have one flat, published price and unlimited documents than count transactions.
- You want to start free and prove it on your own documents before paying anything.
Pricing, on one page
Flat pricing, no per-seat maths, no transaction counting. View Plans & Pricing →
| Plan | Monthly | What you get |
|---|---|---|
| Free | $0 | 5 documents/month, 1 AI review/month, 1 external participant, 100 MB |
| Basic | $19 — or $15 annually | 50 documents/month, 5 AI reviews/month, 3 participants, 500 MB, expiry |
| Pro ⭐ | $49 — or $39 annually | Unlimited documents, 5 participants, 1 GB, audit trail, advanced signatures, cloud integration, API |
Try Indigo e-Sign Free
5 documents a month, AI review included, no card required.
Get Started Free Now →Frequently asked questions
Clear answers to common questions about Indigo e-Sign vs Adobe Acrobat Sign