Choose Formstack if you need
- Integration with Airtable, Box or ActiveCampaign. We haven't found them on Heyflow's website.
- HIPAA. We haven't found it on Heyflow's website.
At a glance
- Formstack offers a free trial (14 days). We haven't confirmed one for Heyflow.
- Formstack's lowest paid plan is Forms at $83 per month, paid annually, as of October 20, 2026.
- Heyflow's lowest paid plan is Starter at €19 per month, as of October 28, 2026.
- Both work with Salesforce.
- Both list SSO.
- Only Formstack lists HIPAA.
- Only Heyflow lists GDPR.
- Formstack has a public API. We haven't confirmed one for Heyflow.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Heyflow if you need
- GDPR. We haven't found it on Formstack's website.
Formstack
Nobody has reviewed Formstack yet. Its rating shows once it has 3 reviews.
Review Formstack
Heyflow
Nobody has reviewed Heyflow yet. Its rating shows once it has 3 reviews.
Review HeyflowThe facts
- What it does
- FormstackCollect data, generate polished documents, and get eSignatures faster with Salesforce-ready tools
- HeyflowHeyflow builds and optimizes funnels that lift your ROAS.
- Free plan
- FormstackNot confirmed
- HeyflowNot confirmed
- Pricing
- FormstackNot confirmed
- HeyflowMonthly plans based on response quota
- Paid plans from
What they share
From the platforms and integrations each website lists.
Integrations
Both
- Salesforce
Only Formstack
- Airtable
- Box
- ActiveCampaign
- Amazon S3
- BigCommerce
- Authorize.Net
- Braintree
- AWeber
- Campaign Monitor
Only Heyflow
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Formstack and Heyflow yet.
Used either of them?
Your review makes this comparison better for the next person. Review Formstack or review Heyflow.