Forminit

Forminit is a headless form backend API for developers who want to build their own form interface and send submissions to a service for processing. It handles server-side validation, storage, notifications, file uploads, webhooks, spam protection, and integrations. Validation covers fields such as email, E.164 phone numbers, URLs, ISO dates, rating ranges, and ISO country codes. Individual uploads can be up to 25 MB, while the Free plan includes 100 MB of file storage.

The service lists integrations with Google Sheets, Zapier, Make, Slack, Discord, and custom webhooks. Its JavaScript SDK captures UTM parameters, advertising click IDs, referrer URLs, and submitter geolocation. Supported frameworks and site builders include React, Next.js, Vue, Svelte, Angular, WordPress, Webflow, Squarespace, and Ghost. iOS and Android apps can submit through its plain HTTP API. Forminit says data is hosted in AWS Ireland and encrypted at rest with AES-256 and in transit using HTTPS with TLS 1.2 or higher. It states GDPR and UK GDPR compliance and offers a Data Processing Agreement. The Free plan is free; paid plans start at $15.83/mo (annual).

Forminit is a fit for people who want to own the form experience and delegate validation and submission handling. Check the plan limits, especially file storage and retention, against your expected use.

Forminit suits developers, agencies, freelancers, startups, and AI/vibe coders who want control over form design while outsourcing backend handling. It can also work for mobile app makers submitting forms through an HTTP API.

Forminit is a backend service for custom forms, suited to developers and teams building their own web or mobile interfaces. It takes care of validation, submissions, uploads and integrations, while leaving form design in your hands.

Overview

Forminit receives entries from forms built in a framework or language of your choice. It handles server-side validation, storage, notifications, file uploads, spam controls and connections to other services. That division gives you control over the form’s appearance and behavior, but requires implementation work: there are no templates or ready-made form interface.

Validation covers common structured fields, including email, E.164 phone numbers, URLs, ISO dates, rating ranges and ISO country codes. This can help keep submissions consistent across clients. The service lists support for React, Next.js, Vue, Nuxt.js, Svelte, Angular, Astro, static-site generators, WordPress, Webflow, Squarespace and Ghost.

Key features

Each submission can include files up to 25 MB, while total storage is 100 MB on Free, 1 GB on Pro and 10 GB on Business. The per-file allowance is useful for attachments, but the Free storage pool can be consumed quickly by larger uploads.

Integrations include Google Sheets, Zapier, Make, Slack, Discord and custom webhooks. The JavaScript SDK captures UTM parameters, ad click IDs, referrer URLs and submitter geolocation, which can help teams connect form entries to marketing activity.

Spam defenses combine built-in filtering with optional Cloudflare Turnstile, reCAPTCHA, hCaptcha or honeypot fields. Forminit says submissions are hosted in AWS Ireland, encrypted at rest with AES-256 and in transit over HTTPS with TLS 1.2 or higher. It also states GDPR and UK GDPR compliance and provides a Data Processing Agreement. Its stated uptime target is 99.9%, with a public status page.

Mobile apps on iOS and Android can send submissions through the plain HTTP API. The platform list also includes web and API access.

Pricing

The free plan costs nothing and permits one form, 100 submissions per month and 100 MB of file storage. Submissions remain archived until manually deleted. That works for a small project or a low-volume pilot, but the form and submission caps leave little room for growth.

Pro costs $16 a month, billed $190 billed yearly, or $190 a year. It allows 15 forms, 5,000 submissions per month and 1 GB of storage, and adds autoresponders, webhooks, a REST API, integrations and analytics. Automatic submission retention is available on Pro and higher. Pro suits a developer or small team moving beyond the free caps, though its 15-form ceiling matters for agencies managing many projects.

Business costs $50 a month, billed $594 billed yearly, or $594 a year. It includes unlimited forms, 50,000 monthly submissions, 10 GB of storage, unlimited workspaces and collaborators, a custom email sender and the option to remove Forminit branding. This is the clearest fit for agencies and larger teams that need shared workspaces or higher quotas. Both paid plans advertise yearly savings, described as two months free on Pro and six months free on Business.

Platforms

Forminit supports web forms and API submissions, with iOS and Android apps able to connect through its HTTP API. Its framework and site support spans popular JavaScript frameworks, static-site generators and hosted publishing platforms, giving teams flexibility while keeping the interface implementation on their side.

Who it's for

Forminit is best suited to developers, agencies, freelancers and startups that want a custom form experience without maintaining submission processing themselves. It also fits AI and vibe coders who can build an interface and want a backend endpoint to handle validation and delivery. It is a poorer fit for people who want templates or a form builder to do the interface work.

Pros and cons

• Pro: Custom interfaces can use a broad range of frameworks and platforms, and mobile clients can submit through the API.
• Pro: Server-side validation, spam controls and integrations cover much of the operational work behind form submissions.
• Pro: Business includes unlimited forms, workspaces and collaborators, which suits agencies coordinating multiple projects.
• Con: No form templates means teams must build and maintain the user-facing form themselves.
• Con: Free allows just one form and 100 monthly submissions, and its 100 MB file pool can be restrictive for attachment-heavy use.
• Con: Automatic retention begins at Pro, so Free submissions need manual deletion when they should be removed.

Alternatives

FormTitan is a paid alternative with a free trial and a listed Document Studio Starter plan focused on document generation or eSignature workflows, native Salesforce integration and Microsoft Add-Ins. It is worth considering when those document and Salesforce capabilities are central to the project.

Formsite has a free plan with five forms, 10 results per form and 50 MB of file space. Its higher form count may suit a reader who needs several low-volume forms on a free tier.

Paperform offers a free plan described as intended for individuals and small teams, with 30 submissions per month, unlimited users and three signed documents per month. It may suit a small team that needs those document capabilities and can work within the lower submission allowance.

SurveyJS lists unlimited forms, submissions and file uploads on its Essential plan. Consider it when those uncapped quantities matter to your project.

Feathery’s free plan allows 500 monthly submissions, five live forms and 10 MB file uploads. Its higher free submission cap may suit a project whose uploads remain small.

FormKeep offers unlimited forms, 50 monthly submissions and one-month retention on its free plan. Its Essential plan is $4.99 a month. Consider it if a low-cost endpoint and short retention window are enough.

forms.app has a free plan with five forms, 10 MB storage, unlimited monthly responses and unlimited team members. It may suit teams prioritizing form count and collaborators on a free plan.

Formsort offers a free plan with 100 flow starts per month, unlimited users and forms, and Formsort branding. Its free form allowance may suit projects needing multiple flows at low volume.

Browse more options in Form API Software or Form Builder Software.

Verdict

Forminit is a strong choice for developers and agencies that want to own the form interface and hand validation, storage, spam handling and integrations to a backend service. Its breadth of integrations and mobile API access support varied projects, while the free plan is constrained by one form, 100 monthly submissions and manual retention. Choose it when interface control is a priority; look elsewhere if you want templates or a ready-made builder, or if those free-tier limits are too small.