Forminit

Forminit is a backend service for custom-built forms, suited to developers and teams who want to own the interface without also maintaining submission processing. It is a strong fit when control and integrations matter more than templates; its free tier is useful for a small form, but the monthly submission cap makes scaling a paid decision.

Overview

Rather than supplying a ready-made form builder, Forminit receives submissions from forms created in a framework or language of your choice. It handles validation, storage, notifications, uploads, spam protection and integrations. That division gives product teams room to match forms to their sites and apps, but leaves interface design and implementation in their hands; there are no form templates to speed that work.

Server-side validation covers email format, E.164 phone numbers, URLs, ISO dates, rating ranges and ISO country codes. Those checks are useful when valid structured data matters beyond what a browser can enforce. Supported frameworks include React, Next.js, Vue, Nuxt.js, Svelte, Angular and Astro, as well as static-site generators and platforms such as WordPress, Webflow, Squarespace and Ghost.

Key features

Uploads can be as large as 25 MB per submission, but the Free plan has only 100 MB of total file storage. That is enough for occasional attachments, not a deep archive of large files; Pro raises storage to 1 GB and Business to 10 GB. Forminit also supports built-in spam filtering and optional Cloudflare Turnstile, reCAPTCHA, hCaptcha or honeypot fields, giving teams several ways to reduce unwanted submissions.

Integrations include Google Sheets, Zapier, Make, Slack, Discord and custom webhooks. The JavaScript SDK captures UTM parameters, advertising click IDs, referrer URL and submitter geolocation, which can help teams connect submissions with campaign sources. Mobile apps on iOS and Android can submit through the plain HTTP API, so developers are not limited to browser forms.

Forminit says submission data is hosted in AWS Ireland and encrypted at rest with AES-256 and in transit over HTTPS using TLS 1.2 or higher. It states GDPR and UK GDPR compliance and provides a Data Processing Agreement. Automatic submission retention is available on Pro and above; Free submissions remain until manually deleted. The company states a 99.9% uptime target and provides a public status page.

Pricing

The Free plan costs nothing and includes one form, 100 submissions per month, 100 MB of file storage and an unlimited submission archive. That is a sensible way to run a modest contact form or prototype, but one form and 100 monthly submissions leave little room for multiple projects or a busy launch. Its archive is unlimited, though automatic retention is not included.

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 an autoresponder, webhooks, REST API, integrations and analytics; the annual plan includes two months free. This is the practical step up for a freelancer or small team handling several live forms or needing automated follow-up and analysis. Business costs $50 a month, billed $594 billed yearly, or $594 a year. It includes unlimited forms, 50,000 submissions per month, 10 GB storage, unlimited workspaces and collaborators, a custom email sender and removal of Forminit branding; the annual plan includes six months free. Its higher quotas and collaboration controls suit agencies or larger teams, but exceed the needs of a single low-volume form.

Forminit is freemium, with paid access starting at $15.83/mo (annual). The free-to-Pro jump raises the monthly allowance from 100 to 5,000 submissions, while Business is the only listed plan with unlimited forms, unlimited collaborators and branding removal. Choose the tier based on expected monthly volume and storage as well as form count.

Platforms

Forminit supports web, API, iOS and Android use. Its API-first model can serve custom interfaces across frameworks and mobile apps, while the backend services remain centered on submission handling rather than a visual builder.

Who it's for

Developers, agencies, freelancers and startups are the natural audience: they can shape a form to a product or client site and offload validation, storage and integrations. It also suits AI/vibe coders who want a backend for forms they generate. It is less appropriate for someone who wants to select a template, publish a finished form quickly or avoid writing interface code.

Pros and cons

• Pro: Custom interfaces can connect to a backend with structured server-side validation, storage and notifications, avoiding the need to build those pieces independently.
• Pro: Multiple spam controls and integrations, plus campaign attribution capture, support workflows that go beyond collecting a basic message.
• Pro: The Free plan includes an unlimited submission archive, making it possible to retain records without a paid storage-style archive cap.
• Con: There are no templates, so teams must build and maintain the form experience themselves.
• Con: Free is capped at one form and 100 submissions per month, and its 100 MB upload storage can be consumed quickly by larger attachments.
• Con: Automatic retention starts at Pro, so free users must delete submissions manually when they want them removed.

Alternatives

Endatix is worth considering for teams that want an always-free, MIT-licensed self-hosted API; its listed hosted option is $360 a month. Paperform is an alternative with a free plan and trial for people comparing form software with a free-forever option for individuals and small teams. forms.app offers a free plan with five forms, unlimited responses and unlimited team members, a different fit for teams prioritizing those quotas over Forminit’s custom-backend approach.

Formsite has a free tier with five forms and 10 results per form, and may suit someone comparing a form-oriented service with a very small results allowance. SurveyJS lists unlimited forms, submissions and file uploads on its Essential plan, and is a candidate when those allowances are the priority. Feathery offers a free plan with 500 monthly submissions, five live forms and 10 MB uploads, useful for a higher free submission allowance with smaller uploads.

FormKeep offers a free plan with unlimited forms, 50 submissions per month and one-month retention, while its Essential plan costs $4.99 a month; it may suit users whose form count matters more than Forminit’s free submission cap. Formsort offers a free plan with unlimited users and forms but 100 flow starts per month; consider it when those form and user allowances fit better.

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

Verdict

Choose Forminit if you can build your own form interface and want validation, storage, spam defenses and integrations handled by an API backend. Its flexibility and practical free entry point are the case for it; the absence of templates and the sharp gap between 100 free monthly submissions and paid quotas are the reasons to look elsewhere if you want a ready-made builder or expect meaningful volume without a subscription.