Alternatives
10 best SolidInvoice alternatives
Tools that cover the same task as SolidInvoice (billing), ranked by how completely their pricing, free tier and API access are documented. Checked Oct 4, 2026.
- SolidInvoice starts at
- $9/mo
- Free plan
- Free trial
- API
- API available
- 01
EspoCRM
EspoCRM is an open-source customer relationship platform for managing contacts, sales pipelines, support cases, and marketing activity in one place. The vendor offers a self-hosted edition you can customize with workflows, automation, and extensions, plus a managed EspoCRM Cloud service with US or EU hosting.
Best for: Small and mid-sized teams that want a customizable CRM they can host themselves or run on EspoCRM’s managed cloud.
- 02
ClearFlask
ClearFlask is an open-source customer feedback platform for collecting ideas, prioritizing roadmaps, and publishing announcements. Teams can run the Apache-licensed stack self-hosted or use ClearFlask Cloud, with AI-assisted feedback analysis on the marketing site.
Best for: Product teams that want a feedback portal, public roadmap, and changelog without building tooling from scratch.
- 03
Ever Gauzy
Ever Gauzy is an open business management platform combining ERP, CRM, HRM, and project management modules. Teams can choose self-hosted editions or Gauzy Cloud subscriptions, with public-roadmap messaging that some modules may still be incomplete while the platform evolves.
Best for: Growing companies that want an open-source operations hub covering HR, CRM, projects, and accounting in one stack.
- 04
NodeBB
NodeBB is modern forum software offered as managed cloud hosting with tiered pageview limits or as self-hosted open source. Paid cloud plans add SSL, custom domains, plugin support, backups, and priority support for communities from hobby groups to large organizations.
Best for: Community managers who want a hosted NodeBB forum without operating their own infrastructure.
- 05
Jotform.com
Jotform is a hosted online form builder for creating surveys, applications, payment forms, and workflows without coding. The cloud platform adds tables, e-signatures, AI agents, and integrations so teams collect submissions, automate follow-ups, and accept payments.
Best for: Marketers, HR teams, and small businesses that need drag-and-drop forms with payments, signatures, and workflow automation in one SaaS account.
- 06
Dify
Dify is a platform for building production-ready agentic workflows, RAG pipelines, and AI apps with visual orchestration, knowledge bases, plugins, and multi-model support. It offers Dify Cloud SaaS plus self-hosted Community Edition and enterprise deployment options for teams moving from prototype to production.
Best for: Developers and teams building agents, chat apps, and knowledge pipelines who want collaborative workspace deployment on cloud or private infrastructure.
- 07
Flagsmith
Flagsmith is an open-source feature flag and remote config service for releasing software safely. Teams can self-host or use Flagsmith Cloud with tiered API call limits, experimentation tools, and enterprise governance features as they grow past the free allocation.
Best for: Product and platform teams managing feature flags, segments, and experiments across cloud or self-hosted deployments.
- 08
Activepieces
Activepieces is an open automation platform for building AI agents, flows, tables, and MCP integrations with a visual builder and cloud or self-hosted deployment. Teams use it to connect apps, run chat-to-automation workflows, and embed white-label automation in their products.
Best for: Builders and ops teams automating internal workflows, plus product teams embedding automation under their own brand.
- 09
Stakpak.dev
Stakpak is an open-source autonomous agent that runs on your machines to keep applications healthy, respond to incidents, and report through chat channels. Paid cloud tiers add managed LLM credits, multi-app autopilot, and team billing.
Best for: Developers and platform engineers who want production autopilot without locking into a proprietary PaaS.
- 10
GhostChat
GhostChat is a lightweight live chat widget and AI chatbot for websites with privacy-first positioning. Plans scale seats, sites, history retention, translation, webhooks, and optional AI replies trained from site content.
Best for: Small businesses and site owners who want embedded chat with optional AI assistance without heavyweight support suites.
SolidInvoice alternatives: common questions
What is the best free alternative to SolidInvoice?
EspoCRM has an ongoing free plan. The open-source edition is free to download and self-host; EspoCRM Cloud plans include a free trial before paid subscription. Free plans change, so check the vendor before relying on one.
What is the cheapest SolidInvoice alternative?
GhostChat has the lowest listed starting price at $5/mo, compared with $9/mo for SolidInvoice.
Which SolidInvoice alternatives have an API?
EspoCRM, ClearFlask, Jotform.com, Dify, Flagsmith mention API or developer access.