Human-in-the-loop where desired
Full control over autonomy levels. Configure which topics the agent handles autonomously, which get drafted for review, and which are left to your team.
Email channel
Respond to emails at lightning speed. With the level of detail customers expect.
Stellar's AI email agents can respond to emails in minutes instead of hours. Automatically triage, draft, and respond, with full human oversight when you need it.
- >70% autonomous resolution
- Human in-the-loop
- 50% lower costs
Why AI email agents
Scale your email support without scaling your team.
Many customer service teams struggle with providing timely replies to their emails. Simple requests get stuck in the same queue as complex cases — and every email costs precious employee time to read, understand, and respond to. Stellar allows you to resolve the 70% of emails involving routine requests instantly, getting your customers the help they need faster while allowing your team to focus on the complex interactions where they can add the most value.
Today
Without AI email agents
- Simple requests blocked behind complex ones
- Same handling time per email, regardless of complexity
- Hours to first response during busy periods
- More volume means more headcount
- Significant time lost on gruntwork for simple requests: collecting info from your systems, drafting responses, updating basic customer details in your systems, and administration
With Stellar
With AI email agents
- Simple emails resolved instantly, freeing the queue for complex cases
- 70% of emails responded to autonomously without human intervention
- Replies grounded in your knowledge base, every time
- Handle increased email volumes without additional hiring
- Gruntwork (drafting, collecting information, updating basic details, and administration work) handled by Stellar, so your team can focus on the complex requests where they can truly make a difference.
Built for email
Everything you need to confidently optimise your email support with AI.
Whether you like to keep full control via manual review or want to automatically respond to certain topics.
Agentic resolution
Your email agent doesn’t just draft replies — it takes action. Look up orders, check account status, process returns, update records, and resolve customer requests end-to-end by connecting to your CRM, helpdesk, and internal APIs.
Knowledge management
Dynamically retrieve relevant knowledge from your documentation, FAQs, and internal processes, or connect the agent to your existing helpdesk or knowledge management system so it can search for answers in real-time.
Intelligent triage & classification
Automatically classify incoming emails by topic, urgency, and intent — routing each to the right response mode before a single word is drafted.
On-brand replies
Feed the agent examples of how your team writes to ensure every response matches your exact communication style. Responses are sent from your domain, in your brand voice — customers interact with your company, not a third-party tool.
Attachment processing
Understands PDFs, screenshots, invoices, and other attachments. Extracts relevant information to craft accurate, context-aware responses.
Complete audit trail
Every email interaction logged, with full transparency into agent reasoning, source attribution, and decision history.
Powerful guardrails for safe interactions
Stellar’s Guardrails system evaluates every turn of the conversation based on a combination of built-in rules and rules specific to your context. Powered by a fully isolated secondary AI model that acts as LLM-as-a-judge, any rule violation is immediately flagged and acted upon — whether to escalate to a human, end the conversation, or nudge the agent to steer in a different direction. Rely on Stellar’s battle-tested guardrail library for common customer service scenarios, and let our team help you configure custom rules tailored to your business.
50+ languages, zero setup
Detect and respond in your customer’s language. 50+ languages supported out-of-the-box, with consistent quality across all of them.
Stellar Studio
Your control center for AI email agents
Stellar’s Studio lets you confidently create and operate your AI email agents, and comes with built-in tooling to effectively design, test, deploy and monitor your agents.
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Stellar’s Agent Editor makes it easy to design and iterate on your agents. Define triage rules, configure autonomy levels per topic, connect to external APIs, and set up guardrails and evaluation criteria.
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Test your agent in Stellar’s Playground via email simulation, or evaluate your agent using automated test suites.
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Stellar automates QA for every email using a set of built-in evaluation criteria, and allows writing your own custom evaluation criteria. Monitoring dashboards, response summaries, and automated scoring help quickly drill down on problem areas.
Integrations
Seamless integration with your existing technology stack.
Stellar can seamlessly integrate into your existing customer service technology stack, allowing Stellar's AI agents to work alongside your human employees. Connect to any customer support system, telephony provider, CRM, or other API-enabled system. Besides a range of built-in integrations, Stellar's flexible REST API connector and MCP connector allow you to easily connect to any API-enabled system.
Security & compliance
Enterprise-grade security and reliability.
Stellar is built with enterprise-grade security and reliability at its core, and trusted by leading enterprises across industries such as insurance, healthcare, retail and hospitality.
- ISO 27001 certified and GDPR compliant
- Zero Data Retention and EU Data Residency contracts with our LLM providers ensure no data is stored by the LLM providers, and all data remains in Europe
- Your data is never used for training the underlying AI models
- A sophisticated combination of deterministic safety layers and LLM-as-a-judge guardrails shields your AI agents from attackers with malicious intent
Combined with a suite of tools to effectively audit, test and monitor your AI agents, you can go to production with confidence.
Visit Stellar’s Trust Center for certification & security controls
FAQ
Frequently asked questions
How does the email agent decide what to do with each email?
You configure the rules. Define which topics the agent handles repliesautonomously, which it drafts responses for human review, and which it leaves entirely to your team. The agent classifies each incoming email and routes it accordingly.
Can I review the agent's responses before they're sent?
Absolutely. The human-in-the-loop mode lets the agent draft responses that your team reviews, edits if needed, and approves before sending. You control the level of autonomy per topic.
How does the email agent access our knowledge base?
Stellar can connect to your existing helpdesk or knowledge management system. The Stellar platform can integrate via a range of pre-built connectors, and if needed our team can build custom integrations for your specific system.
Can the email agent connect to our existing systems?
Yes. Stellar integrates with your helpdesk, CRM, ticketing system, and internal APIs. The agent can look up orders, check account status, and pull customer history to craft accurate, personalized responses. See our integrations page for a full overview of supported platforms and connectors.
Is there a complete audit trail?
Every email interaction is logged with full transparency — agent reasoning, interactions with your systems, and . You can review exactly why the agent responded the way it did.
What languages does the email agent support?
Stellar’s platform uses a combination of multiple AI models, which support over 50 different languages. Stellar’s AI agents have access to any of these languages and can automatically detect and respond in your customer’s language with consistent quality. The full list of currently supported languages is: Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Marathi, Maori, Nepali, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Thai, Turkish, Ukrainian, Urdu, Vietnamese, and Welsh.
How long does it take to go live?
Most customers are live within weeks. Stellar provides expert support throughout onboarding, from agent design through integration and launch.
Is my data secure?
Stellar is ISO 27001 certified, GDPR compliant, with EU data residency agreements and zero data retention agreements with our LLM providers. Your data is never used to train underlying AI models.