Forminit

Forminit is a backend API for forms whose interface you build yourself, making it a better fit for developers and teams than for people seeking a ready-made form builder. Its appeal is the range of submission handling it takes on; the trade-off is that form design and implementation remain yours.

Overview

You can create a form in a supported framework or language and send its submissions to Forminit for validation, storage, notifications, file handling, spam protection and integrations. That separation suits teams that need a form tailored to an existing site or app. There are no form templates, so it is less suitable when the priority is publishing a form with minimal development work.

Forminit supports React, Next.js, Vue, Nuxt.js, Svelte, Angular and Astro, along with static-site generators, WordPress, Webflow, Squarespace and Ghost. Its HTTP API also lets iOS and Android apps submit data, so the backend can serve mobile forms as well as web projects.

Key features

Server-side validation covers email format, E.164 phone numbers, URLs, ISO dates, rating ranges and ISO country codes. These checks help keep structured submissions consistent beyond the form interface. File uploads can be up to 25 MB per submission, but the Free plan provides only 100 MB of total storage; even a small number of large attachments can consume that allowance. Pro raises storage to 1 GB and Business to 10 GB.

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 form activity to marketing attribution. Spam protection combines built-in filtering with optional Cloudflare Turnstile, reCAPTCHA, hCaptcha or honeypot fields.

Submission data is hosted in AWS Ireland, encrypted at rest with AES-256 and in transit over HTTPS with TLS 1.2 or higher. Forminit states that it is GDPR and UK GDPR compliant and provides a Data Processing Agreement. Automatic submission retention is available on Pro and higher; Free submissions remain until manually deleted. A 99.9% uptime target and public status page provide a way to track service availability, though the target is not a guarantee.

Pricing

The Free plan costs nothing and allows one form, 100 submissions per month and 100 MB of file storage, with an unlimited submission archive. That is a useful starting point for a low-volume form, but the form and monthly submission caps make it a poor fit for several live forms or sustained traffic.

Pro costs $16 a month, billed $190 billed yearly, or $190 a year. It supports 15 forms, 5,000 submissions per month and 1 GB of file storage, and adds autoresponders, webhooks, REST API, integrations and analytics. It suits developers or small teams that need multiple forms and a meaningful monthly quota; the yearly option is stated to include two months free.

Business costs $50 a month, billed $594 billed yearly, or $594 a year. It includes unlimited forms, 50,000 submissions per month and 10 GB of storage, plus unlimited workspaces and collaborators, a custom email sender and removal of Forminit branding. This is the tier for larger form operations or teams that need shared workspaces and brand control; its yearly option includes six months free. Both paid yearly prices are stated as billed yearly.

Paid plans start at 15.83 /mo on an annual basis. The published plan details do not specify a trial length or a seat cap for Pro, so readers should compare the explicit form, submission and storage quotas with their expected workload.

Platforms

Forminit is available across web, API, iOS and Android. The mobile apps submit through the plain HTTP API, rather than requiring a separate form-building interface.

Who it's for

Developers, agencies, freelancers, startups and AI/vibe coders who want to control form presentation while offloading backend processing are the natural audience. It is especially relevant when validation, uploads, integrations or attribution matter. People who want templates or a visual form-building shortcut should look elsewhere.

Pros and cons

• Pros: Server-side validation and a choice of spam controls cover common submission-quality and abuse concerns.
• Pros: Framework breadth, mobile/API access and integrations make it usable across varied sites and apps.
• Pros: Pro and Business provide growing quotas, with Business also adding unlimited collaborators and branding removal.
• Cons: No templates means the form interface must be designed and built separately.
• Cons: Free is limited to one form and 100 monthly submissions, and its 100 MB total file storage is modest beside the 25 MB per-submission maximum.
• Cons: Automatic retention requires Pro or higher; Free users must delete submissions manually.

Alternatives

For a self-hosted API with an always-free MIT-licensed option, consider Endatix. Feathery may suit readers whose free-tier limits of 500 monthly submissions and five live forms better match their needs, with custom pricing for Growth. FormKeep offers a free plan with unlimited forms but only 50 submissions per month and one month of retention, a different trade-off for low-volume use. forms.app is a web-based alternative with five free forms, 10 MB of storage and unlimited monthly responses.

Formsite is another freemium option, with a free plan capped at five forms, 10 results per form and 50 MB of file space. Formsort offers a free plan with 100 flow starts per month and unlimited forms, while its Pro plan is $279 a month. HeadlessForms has a free plan limited to one team member, one form and 25 submissions per month. OpnForm is an option for readers who prioritize unlimited forms and submissions on a free plan and can accept required branding.

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

Verdict

Forminit is a strong choice for developers and teams that want a custom form interface backed by validation, uploads, spam controls and integrations without taking on all the submission backend work. Its main limitation is that it does not build the form for you, and the Free tier's tight form and submission caps make it a trial ground rather than a durable choice for growing workloads. Choose it when implementation control matters; look elsewhere when templates or a generous free quota matter more.