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About Atsign
What is Atsign?
Atsign is a Zero Exposure Security Platform that provides the identity and secure networking foundation to connect applications, devices, systems, and AI agents across any network—without open inbound ports or complex infrastructure rework. It was built to protect modern computing by making identity the boundary, keeping infrastructure hidden by design.
How does it work?
Atsign eliminates the need to expose ports or reconfigure firewalls. It uses cryptographic identity to enable authenticated, end-to-end encrypted data exchange. This lets you connect distributed edge devices, smart products, or remote applications across public, third-party, or customer-managed networks with zero open inbound ports and no local network re-configurations.
Who is it for?
Atsign is for security-conscious teams that need to: build verifiable AI agent systems, modernize product-to-cloud networks, or gain remote operations access to internal servers and databases—without exposing critical infrastructure to the public internet. It is not for those who want to keep legacy port-based networking or who don't need zero-trust identity boundaries.
Real use cases
Use Atsign to move AI agents from sandboxed prototypes to production with policy-driven boundaries. Connect smart products and edge devices across customer-managed networks. Cloak internal servers and databases while granting authorized users precise, authenticated access—perfect for remote operations and infrastructure management.
Key features
- Zero Open Ports — Eliminate inbound port exposure and reduce attack surface.
- Cryptographic Identity — Identity becomes the security boundary, enabling deterministic access control.
- End-to-End Encryption — Authenticated data exchange protects all traffic between endpoints.
- Multi-Architecture Support — Works for AI agents, IoT devices, and legacy systems.
- Policy-Driven Boundaries — Define exactly what each agent or user can access and communicate with.
- No Network Rework — Connect across public, third-party, or customer-managed networks without firewall changes.
- Remote Operations Access — Cloak internal infrastructure while granting precise, authenticated admin access.
SaaSpartout Score
7.3
/10
Editorial score from our review methodology — not user ratings.
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Atsign Pricing
Atsign pricing: Custom quote.
Custom Pricing
Atsign does not publicly list pricing. Contact the sales team for a quote tailored to your architecture and use case. A demo is available on request.
No free tier is publicly advertised; a demo can be scheduled to evaluate the platform.
Frequently asked questions
How much does Atsign cost?
Atsign does not publicly list pricing. You need to contact their sales team for a custom quote based on your specific needs, such as number of devices or agents.
Is there a free trial or free plan?
No free trial or free plan is publicly mentioned. However, you can schedule a demo to see the platform in action before committing.
What is Atsign?
Atsign is a Zero Exposure Security Platform that provides secure networking and identity for connecting applications, devices, systems, and AI agents without opening inbound ports.
How does Atsign work?
Atsign uses cryptographic identity to authenticate and encrypt data exchanges. It creates end-to-end encrypted connections without requiring open ports or firewall changes, so you can connect devices and systems across any network securely.
Who is Atsign best for?
Atsign is best for enterprises building AI agent systems, connecting IoT devices or smart products, or needing secure remote access to servers and databases—without exposing infrastructure to the internet.
What are top Atsign alternatives?
Alternatives include Tailscale, ZeroTier, Cloudflare Tunnels, or traditional VPNs and ZTNA solutions. However, Atsign's focus on zero open ports and cryptographic identity is unique.
