
Langfuse
Helicone AI
LangSmith
LangChain
PromptLayer
Humanloop
Braintrust.dev
Openlayer
Forminit
Formspree.io
Basin
Typeform
Jotform
FormSubmit
Wufoo
Formcarry
Langfuse is an open-source LLM engineering platform designed to empower developers by providing insights into user interactions with their LLM applications. We offer tools that help developers understand usage patterns, diagnose issues, and improve application performance based on real user data. By integrating seamlessly into existing workflows, Langfuse streamlines the process of monitoring, debugging, and optimizing LLM applications. Our platform's robust documentation and active community support make it easy for developers to leverage Langfuse for enhancing their LLM projects efficiently. Whether you're troubleshooting interactions or iterating on new features, Langfuse is committed to simplifying your LLM development journey.
Forminit (formerly Getform.io) is a powerful headless form backend that handles form submissions, file uploads, email notifications, webhooks, and integrations. Perfect for developers who want full control over their form UI.
Langfuse
ForminitForminit's answer:
Forminit is a headless form backend API built for developers, agencies, and modern no-code/AI workflows that want full control over form design without maintaining backend infrastructure. Unlike traditional form builders, it works with any framework, static site, backend, mobile app, or AI agent, while handling submissions, validation, spam protection, file uploads, analytics, email notifications, webhooks, and storage in one platform. Its standout differentiators include typed server-side validation, a lightweight SDK with automatic UTM attribution tracking, public + protected API modes, built-in proxy helpers for frameworks like Next.js/Nuxt, and GDPR-friendly EU hosting. Formerly known as Getform.io, it has powered forms since 2015.
Forminit's answer:
Forminit wins on security, flexibility, and completeness. Unlike FormSubmit, your email is never exposed in HTML source. Unlike EmailJS, you get real submission storage, a dashboard, REST API, and webhooks. Unlike Netlify Forms, you are not locked to one host and get 25 MB uploads instead of 10 MB. Unlike Formspree, you get true API key authentication, protected mode, typed validation, and a 2 KB SDK with auto UTM capture.
Forminit's answer:
The primary audience of Forminit includes developers, freelancers, agencies, SaaS teams, startups, indie hackers, AI/vibe coders, and no-code builders who need reliable form handling without building backend infrastructure. It is particularly valuable for teams using frameworks such as React, Next.js, Nuxt, Astro, or static websites, as well as businesses running marketing, lead generation, contact, booking, onboarding, or file upload forms that require analytics, integrations, and secure submission storage.
Forminit's answer:
Forminit started in 2015 as Getform.io with a simple goal: remove the pain of building and maintaining form backends. Instead of forcing teams to create servers, databases, email systems, spam protection, dashboards, and integrations for every contact form, Forminit lets users build forms in any frontend while the platform manages everything after submission. In January 2026, Getform.io rebranded to Forminit, continuing the same service with a broader vision around developer workflows, APIs, automation, and AI-compatible integrations. The product is operated by UK-based UXPLUS LTD and stores data in EU infrastructure for GDPR compliance.
Forminit's answer:
Forminit is built around a headless API architecture with a REST API, a lightweight TypeScript/JavaScript SDK, server-side validation, webhooks, SMTP integrations, and cloud-based storage infrastructure. It provides native workflows and SDK support for ecosystems such as JavaScript/TypeScript, React, Next.js, Nuxt.js, Node.js, Python (Flask, Django, FastAPI), HTML/static sites, and modern frontend frameworks. Data is hosted on AWS infrastructure in Ireland (EU) to support GDPR compliance.
Forminit's answer:
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Based on our record, Langfuse should be more popular than Forminit. It has been mentiond 29 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Langfuse and LangSmith exist for this. Use them. The 30 minutes you spend setting up observability saves you the 87 hours you'd spend debugging blind. - Source: dev.to / 1 day ago
In this project we will build a Python banking assistant agent using Strands Agents and make it observable and continuously evaluated using Langfuse โ step by step. - Source: dev.to / about 1 month ago
Langfuse is the open-source standard for LLM observability. It traces every LLM interaction โ prompts, completions, latency, token usage, cost โ and provides the tooling to debug, evaluate, and optimize LLM applications in production. Think of it as "Datadog for LLM calls" with a focus on prompt engineering workflows. - Source: dev.to / about 2 months ago
You're monitoring production traffic. You need Langfuse / Phoenix / Helicone / Braintrust for that. Online eval is a different problem class: implicit feedback, drift detection, hallucination rates on your data, not on HellaSwag. - Source: dev.to / 2 months ago
Gateway or proxy attribution. A reverse proxy in front of the model-provider API records the request, computes the cost, and exposes per-customer breakdowns. Open-source options include Helicone, LiteLLM, Langfuse, and OpenLLMetry. Hosted equivalents serve as the AI cost observability layer for teams that want centralized visibility: LangSmith, Datadog LLM Observability, Arize Phoenix. Adds a network hop.... - Source: dev.to / 2 months ago
Forminit (formerly Getform.io) is a headless form backend built around a block-based data model. Rather than dumping everything into flat key-value pairs, each field is a typed block (text, email, phone, URL, date, rating, file, country) that gets validated on the server before anything is stored. - Source: dev.to / 2 months ago
I built a form-to-email service like Formspree or Getform. My API accepts form submissions from the client, parses the request with formidable, and then sends the fields via email to the user. Any files submitted with the form are sent as attachments to the email. This way I never store the fields in my database or the files in something like AWS S3. Source: about 3 years ago
By following these guidelines, you can create an effective and user-friendly contact form that helps you connect with potential employers and others. There are several options for setting up a contact form, including using a service like Sendgrid, Mailgun, Formspree, or Getform. - Source: dev.to / over 3 years ago
Getform.io - Form backend platform for designers and developers, 1 form, 50 submissions, Single file upload, 100MB file storage. - Source: dev.to / almost 4 years ago
I would recommend getform, it has a generous free tier as well. https://getform.io/. Source: about 4 years ago
Helicone AI - Open-source LLM Observability for Developers
Formspree.io - Just send your form to our URL and we'll forward it to your email.
LangSmith - Build and deploy LLM applications with confidence
Basin - Collect form submissions, filter spam, and automate workflows โ no backend required.
LangChain - Framework for building applications with LLMs through composability
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!