10 best Esper alternatives

Appetize

Appetize.io streams Android emulators and iOS simulators in the browser for demos, support, testing, and Playwright-based mobile automation. Teams launch cloud devices without maintaining local device labs.

• From $59/mo
• Free plan
• API available

Best for: Support, sales, QA, and engineering teams needing instant mobile app previews in the browser.

Brainboard

Brainboard is a cloud infrastructure management platform for designing architectures visually, generating Terraform or OpenTofu code, and operating GitOps workflows with drift detection. Teams standardize modules, synchronize environments, and deploy across AWS, Azure, GCP, and OCI.

• From $99/mo
• Free plan
• API unknown

Best for: Platform and DevOps teams adopting Infrastructure as Code who want visual design plus Git-backed deployment pipelines.

TestLabs

TestLabs automates Google Play compliance testing on real Android devices for developers and studios. Plans allocate concurrent real-device testers, multi-day test windows, logs, screenshots, and analytics to accelerate store approval.

• From $19/mo
• Free trial
• API unknown

Best for: Android developers and gaming studios needing Play Store real-device testing without maintaining device labs.

serveravatar.com

ServerAvatar is a cloud server management panel for deploying WordPress, PHP, Laravel, Node.js, and other apps across your own VPS instances. Plans add team management, monitoring, white-label reseller options, and security tooling per server limits.

• From $12/mo
• Free trial
• API available

Best for: Agencies and DevOps teams managing multiple customer servers who want a GUI instead of manual SSH setup.

Manufact

Manufact Cloud deploys, tests, and monitors MCP servers and apps for ChatGPT, Claude, Grok, and other clients. It includes cross-client testing, publishing checks, traffic inspection, analytics, and templates from the mcp-use ecosystem.

• From $30/mo
• Free plan
• API available

Best for: Developers and product teams shipping MCP integrations who need hosted infrastructure, testing, and marketplace readiness.

KERNEL

KERNEL provides cloud browser infrastructure for AI agents and web automations, spinning up sandboxed Chromium sessions with stealth, managed auth, GPU acceleration, live view, and telemetry. Developers connect via CDP, WebDriver BiDi, Playwright, OpenAPI, MCP, or official SDKs in TypeScript, Python, and Go.

• From $30/mo
• Free plan
• API available

Best for: Teams building QA, healthcare, e-commerce, or GTM agents that need reliable real-browser automation at scale.

Novu

Novu is open-source notification infrastructure for connecting AI agents and products to customers across in-app, email, SMS, push, WhatsApp, Slack, Teams, and Telegram channels. Cloud plans meter workflow runs while enterprise options add compliance, residency, and self-hosted deployment.

smol machines

smol machines provides fast, hardware-isolated Linux microVMs that run locally via smolvm, in smol cloud, or self-hosted with the same SDK and .smolmachine artifact. Pricing combines hourly base machine fees plus consumption for CPU, memory, disk, and egress, with account credits for new users and tiered monthly platform fees on Pro and Startup plans.

• From $20/mo

PropelAuth

PropelAuth provides authentication and org management built for B2B and AI-native products. The platform covers hosted login UIs, SAML and enterprise SSO, RBAC, API keys, and MCP authentication so teams can ship secure multi-tenant apps faster.

• From $150/mo
• Free plan

Langfuse

Langfuse is an open-source LLM engineering platform for tracing, evaluating, and improving AI agents with collaborative debugging and metrics. Langfuse Cloud offers hosted Hobby, Core, and Pro tiers metered in observability units.

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

Best for: AI engineers who need open-source-friendly observability and eval workflows without building tooling in-house.