123FormBuilder vs Formstack (2026): which should you pick?

Pick 123FormBuilder if

• Fits if you take card payments through a form and already use Stripe or PayPal
• Works for Salesforce users who want form entries to land in Salesforce

Look elsewhere if

• Tight if you stay on the free plan, with 100 submissions a month and 10 fields a form
• Watch out: the paid prices are shown at 50% off a higher crossed-out price, with no end date given
• Pricey if you add people, because extra user licenses cost more on every paid plan
• Skip it if you want your branding removed for free, as that starts on Gold

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

123FormBuilder

• The free Basic plan stops at 100 submissions a month, 10 fields per form and 1,000 form views.
• Paid prices are shown at 50% off higher crossed-out prices, with no end date given.
• The brand is removed from Gold up; Basic forms carry 123FormBuilder branding.
• Extra user licenses are sold separately on the paid plans.

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.

123FormBuilder

Form editor and templates

A form editor with 25+ field types, multi-page forms, digital signatures, Likert scales, embedded files and a template library by form type and industry.

Payment gateways

The site lists integration with 15+ payment gateways, including PayPal, Stripe, Square, Authorize.Net and Braintree.

Salesforce integration

Forms connect to Salesforce Sales Cloud, Marketing Cloud and Experience Cloud.

Branding and domains

Gold removes the 123FormBuilder brand, Platinum adds a custom form domain, Diamond adds a favicon and white labeling is an Enterprise add-on.

Data transfers

Basic allows up to 100 automated data transfers a day; paid plans list them as unlimited.

Accessibility

The vendor says its forms meet WCAG 2.1 Level A and AA and include alt-text for form elements.

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.

123FormBuilder

• Basic$0

  5 forms, 100 submissions a month, 10 fields per form, 1,000 views and up to 100 data transfers a day.

• Gold$18.50

  per month, billed yearly

  Shown at 50% off a crossed-out $37. 25 forms, 5,000 submissions a month, 250 fields per form and 1 GB of storage.

• Platinum$24.50

  per month, billed yearly

  Shown at 50% off a crossed-out $49. 100 forms, 20,000 submissions a month, 500 fields, 10 GB and a custom form domain.

• Diamond$49.50

  per month, billed yearly

  Shown at 50% off a crossed-out $99. 200 forms, 100,000 submissions a month, 800 fields and 100 GB of storage.

• Enterprise$225

  per month and up, billed yearly

  Unlimited forms, submissions and fields, with 100 GB or more of storage. Sold through sales.

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.

123FormBuilder

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.