eSignature software for API for start-ups

Take your start-up's API tool the next level with this electronic signature solution and save more time.
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How to use SignHouse for API Start-Ups

1. Upload your document

Select document that you want to electronically sign through your start-up’s API. Upload your file by dragging and dropping it in our editor.

2. Edit and send

Customize your document according to your needs. In this stage, you can change a document's look or overall form. When you're done, send it to for signing.

3. Gather signatures

You can track the progress made to the document after sending it. In the meantime, we'll teach your signees how and where to fill and sign the file.

Better interaction → More sales

With our eSignature API, you can digitalize your start-up's documents and signatures and offer clients a better paperwork experience. This way, you'll improve your workflow and get more sales.

Start-up signing on the go

Electronically sign documents for your start-up wherever you are. As start-ups can sometimes be unpredictable, SignHouse is ready for any situation: you can eSign on any mobile and desktop device.

Respected privacy

All of your documents are safe and private at SignHouse. Aside from us respecting your privacy, you can always go to the next level and secure files with our password protector. Limit people's access!

Why SignHouse

Build & Sign in the same place

Unlike other companies, SignHouse has built an electronic signature software for start-ups and a document builder/editor that are all accessible in the same spot. Our software is designed to offer an all-in-one tool that helps you digitalize all of your paperwork and automatize your work.

For founders and their teams

Whether you've started your company alone or with a co-founder or a larger team, know that SignHouse's eSignature solution for start-ups is made for all types of teams. Invite your teammates, share documents, and work together to electronically sign documents and finish work faster.

Better plans

Exhausted by monthly subscriptions and seeing your money going out of your account with each new month? SignHouse has the perfect solution for that — our lifetime deal offer lets you purchase our eSignature software for start-up API's once and enjoy all of the features forever.

We're here to help you

Got any questions about the eSignature solution for start-up API? Know that our support team is just one click away from you. We're always happy to answer your questions about this software and help you understand how all of our tool's features work. Alternatively, visit our library of guides.

No-brainer pricing for a small business - or even big business, I reckon : - )

Tried the product. Worked like a charm. Never had any problem + the clean UI got us. Wish there would be more features, but I believe in the team behind.
Harsh G.
Founder, CEO
SignHouse has been nothing short of convenient, efficient and fast. Oh and top notch customer support too...

Couldn't ask for more!
Julie M.
Executive Administrative Assistant
SignHouse has made a big difference in the workflow of my business. Sure there are other, more mature e-signing platforms out there, but they are all convoluted and too focused on big, enterprise companies. It feels like SignHouse is on our side.
Michael B.
Photography Consultant
Getting documents to parents is significantly simpler now. However, even more importantly, parents aren't getting lost in the signing process anymore. 👍
Sandy T
SignHouse was AMAZING for what we needed. "Do one thing and do it well" - they've nailed that, as everyone is very happy with the product here.

Looking forward to seeing how the product develops, as the team is super ambitious.
Kate Gross
Manager at
"Simpler, yet does the job better than most of the clunky eSignature software out there"
"SignHouse cut down on our signing processes by at least 50% - and we were using eSignature software before as well"
"I just never thought signing documents can ever become a pleasurable experience"

What's different about SignHouse?

SignHouse is completely free to start. Just upload a doc and start signing in a few minutes!
What’s your cost of losing doc signatures just because signing didn't work on mobile? We fix that.
Optimized for 0 headache
SignHouse was made to simplify the eSigning. Long gone are the days of clunky solutions.
Trackable documents
Documents signed with SignHouse come with simple analytics that just don’t give you a headache.
It Just Works™
Big, old software is buggy, clunky and slow. Built with simplicity in mind, we make signing a breeze.
Fast to use, fast to load. The SignHouse experience will be snappy for you and your signers.

Frequently asked questions

Are your electronic signatures legal?

Our signatures are 100% legally binding, as SignHouse is built around US and International Laws concerning digital signatures. SignHouse eSignatures are on par with paper signatures, from a legal point of view!

Signing papers digitally started being equal to physical, handwritten signatures in the U.S. eSignature Act of 2000 (U.S. Federal Act) + the Uniform Electronic Transaction Act (UETA). As a consequence, laws in other countries have followed suit. SignHouse is built around these laws.

Are you adding an actual eSignature or just an image?

All signatures are a real, eSignature that is 100% legally binding.

We save important, relevant data (that can be used legally in all types of situations, including in courts) such as identifiable details of a person, IP addresses, etc, just so our electronic signatures can be as valid as digital signatures can get.

What about privacy and security?

SignHouse's signatures are secure for all kinds of businesses and companies. All our signatures happen on a secure, SSL-connected domain. Documents are not made public and unique keys are generated through SignHouse so that privacy and security are at the foundation of the documents on our platform.

How do my signees get to sign with SignHouse?

We've streamlined the signing process so that your signees can sign your documents with no hurdles at all — and with the smallest amount of steps required. It can take as little as 30 seconds! 

How do you compare to ______?

We have a generous free plan, so we highly encourage you to make the comparison yourself! It costs you nothing - and no hard feelings if you don't want to go with us.

We would really love to know what made you go with us or somebody else! If you could take a moment to write to us about that, we'd highly appreciate it.

What if I have more questions?

Then we're standing by to help. Contact us, and we'll do our best to help 🤗