FormAssembly vs Formstack (2026): which should you pick?

Pick FormAssembly if

• Fits if your forms must write data into Salesforce
• Works for teams in healthcare or finance that need compliance controls

Look elsewhere if

• Skip it if you want to see a price, because every plan is quoted after a demo request
• Not for you if you need a free plan, as none is listed
• Watch out: plans carry yearly allowances, 12,000 responses on Collect and 60,000 on Automate, with extras billed as used
• Watch out: Collect forms carry FormAssembly branding, so check what each plan removes

Pick Formstack if

• Fits if you want forms, generated documents and e-signatures from one vendor
• Works for Salesforce teams who want forms inside their org, or forms that pass through several reviewers

Look elsewhere if

• Pricey if you only need forms: $83 a month billed yearly ($99 monthly) for 1 builder, 25 forms and 1,000 submissions per form
• Not for you if you want a free plan, since there's only a 14-day trial
• Skip it if you need e-signatures or document generation on a budget, as those come with Suite at $250 a month
• Watch out: HIPAA compliance is an add-on, and API access, SSO and custom SLAs are on Enterprise with no public price
• Not for you if you want a phone or desktop app, as Formstack runs on the web only

FormAssembly

• No plan has a published price; every plan is quoted after a demo or trial request.
• Plans carry yearly allowances: Collect 12,000 responses and 600 documents, Automate 60,000 and 3,000.
• Extra responses and documents are billed as used, or bought as add-on packs.
• Collect shows FormAssembly branding on forms and themes.

Formstack

• There is no free plan; the entry price is $83 per month paid annually after a 14-day trial.
• The Forms plan includes one builder user, 25 forms and 1,000 submissions per form.
• Document generation and eSignatures come with the Suite plan, not the Forms plan.
• HIPAA compliance is listed as an add-on, and SSO and custom SLAs under Enterprise.

FormAssembly

Forms and data mapping

Build forms quickly and map submitted data into connected systems, with document generation and single-signer e-signature on the entry plan.

Workflows and approvals

The Automate plan adds multi-step workflows with reviewers and approvers, plus multi-party e-signature in sequence or in parallel.

AI assistant and intake agents

Every plan lists the Fai assistant, which builds a process from a description, and Intake Agents that guide respondents in chat or by voice.

Compliance and governance

Enterprise adds collection policies, audit chain of custody and retention controls; the site lists FedRAMP, GDPR, HIPAA, PCI DSS and TX-RAMP pages.

Integrations

Salesforce, Microsoft Dynamics 365, HubSpot, Google Sheets, Stripe and webhooks can be added to any plan as paid connections.

Mobile app

A FormAssembly Mobile app is listed on the App Store and Google Play.

Formstack

No-code form builder

Formstack Forms builds custom online forms without code and styles them with an organization's logos, colors and themes.

AI form creation

An AI-powered builder drafts a form, so users do not have to start from a blank page or add every field by hand.

Form prefill

Send prefilled links, or use SSO-powered prefill to populate information that is already known about the person completing the form.

Approvals and step logic

Group approvals, step logic and conditional routing move a submission through the people who need to review it.

Documents and Sign

The Suite plan generates documents from collected data, with 250 document deliveries a month, and includes unlimited eSignatures with no per-envelope fee.

Forms for Salesforce

A separate Salesforce-native product whose forms are built and managed inside a Salesforce org. It is sold with custom pricing.

FormAssembly

Pricing could not be confirmed. See formassembly.com.

Formstack

• Forms$83

  per month, paid annually ($99 billed monthly)

  1 builder user, 25 forms, 1,000 submissions per form and 2 GB of storage.

• Suite$250

  per month, paid annually ($299 billed monthly)

  Forms, Documents and Sign: 3 builder users, 100 forms, 5,000 submissions per form, 10 GB, 250 document deliveries a month and unlimited eSignatures.

• Salesforce SolutionsCustom

  Salesforce-native forms with document generation and eSignature, Experience Cloud integration and Salesforce Shield compatibility.

• EnterpriseCustom

  Unlimited users and submissions, SSO and advanced security, custom SLAs, API access and a dedicated Customer Success Manager.

FormAssembly

No public discounts listed.

Formstack

• Annual discount

  Save 2 months with annual plans

  Forms is $83 per month paid annually versus $99 on monthly billing, and Suite is $250 versus $299. The pricing page describes the saving as 2 months.

• Nonprofit

  25% nonprofit discount

  Formstack gives 25% off to 501(c)(3) organizations and comparable registered charities abroad. Educational and governmental institutions are not eligible.