Polyant vs Mastra.
Polyant and Mastra are both modern solutions for building AI agent fleets in the enterprise. Polyant stands out for simplicity and adoption speed, including for internal technical teams, and offers contractual data residency with managed services in a region of the customer's choice. For companies in European regulated industries, this is a decisive difference.
State-of-the-art technology, two different adoption paths.
Polyant and Mastra are two TypeScript products for building AI agents, with comparable baseline capabilities: persistent memory, access to the leading AI models, and an extensible tool registry. Both are mature solutions, suited to companies that want to put agent fleets into operation with an internal technical team or a development partner.
Polyant stands out on two axes. The first is adoption speed: the admin panel, native channels, security controls, persistent memory, and analytics dashboard are already available out of the box, including for those who adopt the product independently with an internal technical team. The second is the contractual availability of data residency in an EU region, with managed services and an Exelab-supported delivery path for those who want to accelerate adoption. For companies operating in European regulated industries, the combination of contractual data residency, an EU-headquartered vendor, and built-in runtime governance in the managed offering can make the difference.
Mastra is a TypeScript toolkit designed for technical teams that build AI agents independently. Polished development, graph-based workflow engine, integrated evaluation tools, broad vector database choice, proprietary US cloud offering for the management model. The customer works on the product, builds the agents, integrates the systems, and takes them to production with an in-house team or an external system integrator.
Eight purchase dimensions compared.
| Polyant | Mastra | |
|---|---|---|
| Data sovereignty and residency | Deploy in the customer's cloud account, Exelab infrastructure in EU, or on-premise | Self-host managed by the customer, or Mastra Cloud (cloud service on Mastra US infrastructure) |
| EU enterprise vendor | Exelab, EU-headquartered. ISO 27001. HubSpot Elite Solutions Partner, Twilio Gold Partner, vendor qualification on regulated-industry companies | Mastra Inc., United States. Startup backed by Y Combinator |
| Purchase model | Product + Exelab professional services + three managed service profiles in a single contract. Contractual SLA | Framework to be implemented with an in-house technical team or external system integrator, or Mastra Cloud as a separate cloud service |
| Multi-instance multi-tenant | Native architecture: isolated instances with AES-256-GCM secrets per instance, centralised admin panel | Oriented to a single application: multi-tenant isolation to be built at the application level |
| Built-in security and control | Security controls compiled in the runtime, decision registry inspectable via standard SQL, AI Act and GDPR mapping | Quality evaluation tools and OpenTelemetry tracing; security controls to be built at the application level |
| Native customer-facing channels | Telegram, Slack, WhatsApp, OpenAI-compatible API | Slack, Discord, Telegram via Chat SDK adapter |
| AI providers and stack freedom | OpenAI, Anthropic, AWS Bedrock with full access (Amazon Nova, Anthropic, Llama, Qwen, DeepSeek, Mistral) under the customer's cloud account; observability with LangSmith or the customer's stack | Universal model routing via Vercel AI SDK; Mastra Studio as proprietary observability dashboard or OpenTelemetry export |
| Technical stack and adoption path | TypeScript, NestJS, Next.js, PostgreSQL, Drizzle. Admin panel, channels, built-in controls, memory, and analytics dashboard already ready | TypeScript with graph-based workflow engine and broad vector database choice; admin panel, channels, and controls to be assembled in production |
Seven situations where Polyant is the most direct choice.
The admin panel, native channels, security controls, persistent memory, and analytics dashboard are ready from the first installation. Standard stack (TypeScript, NestJS, Next.js, PostgreSQL, Drizzle) with a self-registering tool registry and markdown skills configurable even by the business team. The customer's team can move faster instead of assembling components from scratch.
The instance runs where the customer chooses: in their own cloud account, on the Exelab infrastructure in EU or another customer-chosen region, or on-premise. The AI models accessible via Bedrock stay in the customer's cloud account. For those with formal data residency or regulatory sovereignty requirements, this is a fundamental difference.
EU-headquartered partner, ISO 27001 certified information security management system, active vendor qualification on financial and insurance procurement, HubSpot Elite Solutions Partner and Twilio Gold Partner. For formal EU requirements (DORA, NIS2, sovereignty cloud), the vendor's registered seat becomes a relevant legal assessment dimension.
Product, professional services (discovery, agent construction, integration with the customer's systems, and hand-off to the operations team), and three managed profiles (Core, Advanced, Ultra) in a single Exelab contract. For the C-level, it means being able to accelerate adoption with confidence. It is the most direct model: one contract, one interlocutor.
One deployment serves multiple agents per department, business unit, or use case, with secrets encrypted per instance and centralised admin panel. No cross-blast radius: if one instance's key is compromised, the others remain sealed.
Full AI model choice: OpenAI, Anthropic, or AWS Bedrock with access to the leading models (Amazon Nova, Anthropic, Llama, Qwen, DeepSeek, Mistral). Observability with LangSmith, now the market standard for AI tracing, or with the customer's OpenTelemetry stack. The software is auditable by the CIO and the legal team before signature. The customer is not locked into a vertical ecosystem.
Security controls compiled into the runtime with versioned scope policy, decision registry inspectable via SQL, AI Act and GDPR mapping. For companies in European regulated industries, these are compliance tools already integrated into the product.
Mastra remains a solid choice in two scenarios.
For teams that need an explicit graph-based workflow engine (.then() / .branch() / .parallel()) or integrated evaluation tools as primary project capabilities, Mastra is the most direct choice. Its technical abstraction is built for these scenarios.
Six substantial differences in the purchase model.
What the vendor delivers to the customer.
Polyant delivers product, Exelab professional services that build the agents for the customer, and three managed service profiles in a single contract. Mastra delivers the development toolkit; the customer assembles the construction (in-house team or external system integrator) and the lifecycle management (Mastra Cloud, or in-house operations) separately.
Who the typical buyer is.
Polyant is designed to address the needs of all main corporate stakeholders, serving as a meeting point between business, technology, and compliance. Mastra primarily addresses the CTO, the Tech Lead, and product teams that evaluate the platform on the development side while respecting business requirements.
Where the software runs in the managed model.
Polyant runs in the customer's cloud account in an EU region, on the Exelab infrastructure in EU, or on-premise. Mastra Cloud is a cloud service on Mastra infrastructure in the United States, in beta, with no declared BYOC option.
How results are measured.
The results of both products are measured by the company's ability to scale processes through the implemented agent squads, relative to the cost of adoption and adherence to the customer's regulatory obligations. For companies in European regulated industries, Polyant provides the regulatory compliance measurement tools ready out of the box.
How the product is managed after go-live.
Polyant offers continuous infrastructure management, software maintenance, and operational support under one of three managed profiles, differentiated by SLA level, customer criticality, and watch window. Agent management (rules, prompts, new instances) can be delegated to Exelab under a service contract or remain with the customer's team via the admin panel or code. With Mastra, the customer handles everything independently (server, patching, incident response, updates) or uses Mastra Cloud, the proprietary service that covers product management on Mastra infrastructure in the United States.
What goes into the legal and procurement assessment.
Polyant is delivered by Exelab, EU-headquartered with its registered office in Rome, with service management in an EU region or one chosen by the customer. Mastra is delivered by Mastra Inc., headquartered in the United States, with cloud service on US infrastructure. For EU enterprise procurement, vendor seat and service delivery region are formal assessment dimensions.
Four recurring questions on the comparison.
Yes. Both products are in TypeScript and share the main AI provider abstraction patterns (OpenAI, Anthropic, Mistral, and models accessible via AWS Bedrock). Migration typically requires rewriting the controls configuration, the decision logging logic, and the tool integrations. The Exelab team assesses migration case by case in discovery and includes it in the delivery plan.
The typical timeline for the first agent in production is 4–8 weeks: discovery, configuration, integration with the customer's systems, and hand-off to the operations team. For a squad of multiple agents, the estimate rises to 8-12 weeks. The main factor is the number of integrations with the customer's systems and the depth of operational rules. The actual duration is defined in discovery based on the real case.
Yes. Polyant is built to handle typical European regulated scenarios as the most demanding baseline: if the product meets the requirements of a bank under DORA or an insurer under IDD, it will have no difficulty in other contexts. Non-regulated customers get the same robustness (inspectable decision registry, per-instance encryption, deployment under customer control) without having to manage the typical complexities of regulated industries. Compliance is a strength of the solution, but does not affect its flexibility or ease of implementation.
They are different commercial models. Mastra Cloud is a proprietary US cloud service. Polyant managed is delivered by Exelab in an EU region, with a proposal built around the customer's real needs.
Two possible paths.
Conversation with the Exelab team to reason about the customer's specific use case, or deeper dive on the product to see if Polyant's features answer the customer's needs.