10 best OpenSign alternatives

Documenso

Documenso is an open-source electronic signature platform positioned as a DocuSign alternative. Users sign documents, build templates and workflows, and integrate signing into other tools via hosted or self-hosted deployments.

• From $25/mo
• Free plan
• API available

Best for: Individuals and teams needing modern e-signatures with open-source deployment options.

Bitwarden

Bitwarden is an open-source password manager for individuals, families, and businesses with encrypted vaults, sharing, SSO, and optional self-hosting. Personal and business pricing publish named Free, Premium, Families, Teams, and Enterprise plans with per-user monthly USD rates on the public pricing pages.

• From $1.65/mo
• Free plan
• API available

Best for: Individuals, families, and organizations that need audited open-source credential storage with optional business policies and self-hosting.

Chatwoot

Chatwoot is an open-source customer support platform with cloud hosting, shared inboxes, live chat, help centers, automations, and Captain AI for copilot and assistant features. Cloud pricing is per agent with a free Hacker tier and paid plans that add channels, voice, and AI credits.

• From $19/mo
• Free plan
• API available

Best for: Support teams wanting an open-core Intercom alternative with optional AI copilot on hosted plans.

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.

• From $20/mo
• Free tier unknown
• API unknown

Best for: Community managers who want a hosted NodeBB forum without operating their own infrastructure.

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.

Forms.app

forms.app is a team-oriented form builder with AI form creation, unlimited responses on the free tier, payments, signatures, and deep integrations. Paid plans raise form counts, storage, branding removal, and analytics features.

• From $29/mo
• Free plan
• API available

Best for: Teams collecting surveys, leads, and payments who need collaborative form building with generous free limits.

Astogi

Astogi sells integrations and automations that extend Asana, including auto task numbering, ChatGPT inside tasks, round-robin assignment, team alias and collaborator tools, and Git commit tracking. Teams can start on a free tier for one project or subscribe for more integrations and unlimited tasks.

• From $29/mo
• Free plan
• API unknown

Best for: Asana teams that want pre-built automations and optional custom integrations for project workflows.

Icedrive

New users can start with 10 GB free before upgrading to higher-capacity Pro plans for larger libraries.

• From $9.99/mo
• Free plan
• API unknown

Best for: Individuals and professionals who want encrypted cloud storage with straightforward monthly Pro upgrades.

Constructable

Constructable is AI-assisted construction management software covering field logs, drawings, RFIs, submittals, takeoffs, and financial workflows. Marketing emphasizes unlimited users, flat monthly pricing, and fast onboarding compared with legacy construction suites.

Dynatrace

Dynatrace is an observability and security platform that unifies application performance, infrastructure, logs, digital experience, and AI-assisted workflows on one analytics core. Customers commit annually at the platform level and consume capabilities via transparent rate-card units such as hosts and pods.

• From $7/mo
• Free trial
• API unknown

Best for: Platform and SRE teams needing full-stack observability with consumption-based enterprise pricing.