SignNow, Dropbox Sign and Docusign API Pricing: 8 E-Signature Rate Cards Compared

This is the single largest number on the page and it comes from a metering choice, not a price.

Docusign publishes three self-serve plans: Personal at $11 a month with an allowance of "5 per month", Standard at $30 per user per month, and Business Pro at $45 per user per month, all billed annually. Both business tiers carry the same envelope allowance, published as "100/user/year". API access is not the gated part. Docusign states that all plans include a "Developer account" and "Industry-leading APIs", which sounds generous and is the reason this trap is easy to walk into.

Now think about what an integration looks like. Your application sends a contract when a customer clicks accept. Nobody logs in. There is no sales rep, no HR manager, no human sender at all. You have one service account and you need 1,000 envelopes a year.

On the published ladder, one seat buys 100 envelopes a year. To get 1,000 you buy ten seats. Ten seats on Standard is $300 a month, $3,600 a year, and nine of those seats will never be used by a person. On Business Pro it is $5,400. You are not paying for software, you are paying for the fiction that each envelope belongs to an employee.

Every other vendor in the table meters the thing your integration actually produces. BoldSign charges $0.75 per envelope. DocuSeal charges $0.20 per completion. SignWell charges per API document. SignNow sells a bucket of signature invites per year and explicitly says its API plans "focus on sending signature invites through one or more integrations rather than through users." That sentence is the whole distinction, and SignNow is the only vendor here that writes it down.

The honest qualifier: Docusign sells API plans through its sales team on different terms, and a real integration would be quoted rather than buying ten seats on the website. But Docusign does not publish those terms, which means the only Docusign price a buyer can compare is the one that is wrong for the job. If you are building a shortlist from public information, and most teams start that way, Docusign looks about five times more expensive than it may turn out to be, and the reason is a metering unit rather than a rate.

The second trap is a word. Several of these vendors advertise unlimited documents on plans that cost $10 to $40 a month, and every one of those unlimited claims is about the web application, not the API.

SignWell is the clearest illustration because both numbers sit in the same table on the same page. The plan cards say "Unlimited Documents" for Light at $10 a month and Business at $30 a month. Further down, the feature comparison has a row labelled "Free API documents / mo", and the values on that row are 3, 15 and 25. So a $30 plan that sends unlimited documents through the browser includes 25 a month through the API, after which the published rate "starts at $0.85 per API document and decreases with monthly volume, down to $0.20/document".

That is not a criticism of SignWell, which prices the API honestly and publishes the ladder, unlike most of this market. It is a warning about how to read any of these pages. The unlimited applies to the humans. The API is a separate meter, and on several vendors a separate product with a separate invoice.

Dropbox Sign is the extreme version: the API is sold entirely apart from the application, on its own pricing page, at $75 a month for Essentials and $250 a month for Standard. If you want both a team sending contracts by hand and an integration sending them automatically, you buy two subscriptions.

SignNow splits the same way, with eSignature plans at $8 to $30 a month and API plans starting at $146 a month billed annually, though it does at least let an API plan use the web interface too: "Once you purchase an API plan, you will be able to send and sign documents immediately through the airSlate SignNow website."

Before you compare any two prices in this category, establish which product each one is. It is genuinely common to shortlist a $10 plan against a $250 plan and not notice they are not the same kind of thing.

Strip out the plan names and divide. At 1,000 API signature requests a year, on published rates, read 2 September 2026:

• DocuSeal self hosted, $0. The open source edition is free with unlimited emails and submissions and you run it yourself.
• DocuSeal cloud, about $0.40 each. $20 per user a month plus "$0.20 / completion" for anything signed via API or embedding. One service seat and 1,000 completions is roughly $400 a year. Sandbox documents are "$0/ document".
• Documenso Teams, about $0.48 each. $40 a month for unlimited documents with "API Access for Automation" and embedded signing, five users included. The per signature cost keeps falling as you send more, which is the opposite of every metered vendor here.
• BoldSign, $0.75 each. Published flatly as an Enterprise API rate, on a $30 a month minimum that includes 40 envelopes and "two application users". The clearest single number in the category.
• SignWell, $0.85 falling to $0.20. Volume dependent, after 25 free API documents a month.
• Dropbox Sign, $1.50 each at the Essentials anchor. $900 a year buys the 50 a month tier, 600 requests. Dropbox Sign states that "The more signatures you request per month, the less each request costs" and shows bands at 50, 100, 250, 500 and 750 plus, so the rate improves with volume even though only the two anchor prices are published.
• SignNow API, $1.75 each. $146 a month billed annually for 1,000 invites a year, with 500, 2,000 and 5,000 also selectable.
• Docusign, $3.60 each on the published Standard ladder. $360 per seat per year divided by 100 envelopes per seat per year, before you account for having to buy ten of them.
• Adobe Acrobat Sign, unknown. Adobe describes it as "our standalone e-signature solution with unlimited seats" and publishes no price for it.

That is a spread of roughly nine times between the cheapest and dearest published options for identical work, and it is invisible from the plan cards, where every one of these vendors looks like a $10 to $40 a month product.

Two smaller mechanics are worth knowing before you commit. SignNow does not bill overage; it moves you up a plan: "Once you reach your plan limit, we will automatically upgrade you to the next subscription plan tier. There will be no interruption in your service, you will simply be charged the difference." That is friendlier than a hard stop and more expensive than a warning. And SignNow counts only finished work: "Only completed (signed) invites are counted. Opening a document does not count."

Volume alone does not pick the winner here, because the vendors differ most in what happens at the edges.

If you are embedding signing inside your own product, start with DocuSeal or Documenso. Both price the API as the main event rather than an add-on, both offer embedded signing, and both can be self hosted, which matters if your customers ask where their contracts live. Documenso Platform at $250 a month adds "Embedded Signing (Whitelabel)" if the signing screen must carry your brand and not the vendor.

If you want one obvious number and no arithmetic, take BoldSign. $0.75 an envelope with a $30 monthly floor is the most legible pricing in the category, and its web app tiers at $5 and $15 per user a month billed yearly are cheap if some of your team also sends by hand.

If your team sends a lot by hand and the API is secondary, SignNow is unusually good value for a reason unrelated to the API: unlimited users on every plan. Its pricing page states "Add unlimited users to your subscription for free - no extra fees for scaling your team", so a thirty person team pays $30 a month on Enterprise where Docusign Standard would be $900. Its API plan is separately the most expensive per signature in the table, so buy the two deliberately.

If you need enterprise procurement to sign off, Docusign and Adobe are still the defaults and often the only names your legal team will accept. Budget for a sales conversation rather than a credit card, and do not build your business case on the published seat prices.

If the signature is the last step of a document you are generating anyway, price the generation separately. Rendering the contract, invoice or agreement is a different job from routing it for signature, and the vendors above charge for signatures, not for producing the document. Our document generation API page covers that half, and legal document automation software compares the assembly platforms that sit above both.

Five questions decide the invoice, and only the first is answered on the pricing page.

1. What is the billable unit, and does your integration have any of them? Seats, envelopes, completions, signature invites and API documents are five different things. If the unit is a seat and your sender is a service account, the published price is not your price.

2. Is the API a separate subscription? At Dropbox Sign and SignNow it is a separate product with its own pricing page. At Docusign, SignWell and BoldSign it is a tier or a meter on the same account. This single fact moves entry cost by an order of magnitude.

3. What does embedded or white labelled signing cost? It is nearly always a higher tier than the one you costed. Documenso puts whitelabel embedding on the $250 a month Platform plan against $40 for Teams. Budget for the tier you will end up on, not the one you start on.

4. Is the allowance annual or monthly, and what happens when you cross it? An annual bucket of 1,000 does not help a business with a seasonal peak of 400 in one month. SignNow auto-upgrades, SignWell charges per document, Docusign allowances reset yearly per seat.

5. What are the extras charged separately? Identity verification and SMS delivery are billed on top almost everywhere. Docusign publishes SMS delivery "Starting at $0.36/delivery" and ID verification "Starting at $2.40/ID verification attempt". DocuSeal includes 20 SMS requests a month and then charges "$0.20 per SMS". On a high volume identity heavy workflow these lines can exceed the signature line.