10 best Checkly alternatives

LangSmith

LangSmith is an enterprise LLM observability, evaluation, and monitoring platform built by LangChain.

• From $39/mo
• Free plan
• API available

Best for: Developers and engineering teams building LLM-powered applications and agents who need debugging, prompt optimization, latency tracking, and quality evaluation.

AgentQL

AgentQL by TinyFish connects LLMs and agents to the web with a query language and SDKs for extracting structured data from dynamic pages. It offers Playwright integrations, a browser extension debugger, REST browserless access, PDF parsing, and tiered API plus remote browser usage.

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

Best for: Developers building web agents or data pipelines who need resilient selectors beyond brittle XPath or CSS paths.

FACEIO

FACEIO is a passwordless facial authentication SDK for websites and apps, combining face recognition, liveness detection, and age verification through a browser widget and REST API. Developers enroll users once and authenticate them with face scans instead of passwords.

• From $20/mo
• Free plan
• API available

Best for: Web developers who need cross-browser face login, liveness checks, or age gates without building biometrics in-house.

Aikido Security

Aikido Security is a developer-first application security platform covering dependencies, SAST, secrets, cloud misconfigurations, containers, and AI-assisted autofix across the SDLC. Pricing tiers scale from a free Developer workspace to paid Basic, Pro, and Advanced plans for larger repos and infrastructure coverage.

• From $300/mo
• Free plan
• API available

Best for: Engineering and security teams that want consolidated scanning, autofix, and cloud posture checks tied to Git workflows.

drumbeats.io

Drumbeats monitors cron jobs, uptime endpoints, and background workers with heartbeat alerts when schedules are missed or services go down. It bundles public status pages, multi-channel notifications, REST API and MCP access, and unlimited team seats on every plan.

• $20/mo

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.

Mem0

Mem0 provides persistent memory infrastructure for AI agents and applications so context survives across sessions, users, and agents. The platform offers hosted plans with SDK integration plus open-source options for developers building production agents that need durable recall.

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

Honeybadger

Plans scale usage thresholds and collaboration features for solo developers through business teams.

• From $26/mo
• Free plan
• API available

Best for: Solo developers and engineering teams who want unified error, log, uptime, and cron monitoring without assembling multiple tools.

Voker

Voker is an analytics platform for AI agents in production, capturing intents, corrections, and resolutions from live conversations. SDKs wrap popular LLM providers so teams can monitor agent quality without digging through raw logs.

• From $80/mo
• Free plan
• API unknown

Best for: Product and engineering teams shipping customer-facing AI agents who need usage analytics and optimization signals.

Kompy

Plans meter monthly credits with concurrency and request-rate limits for developers and AI agents.

• From $25.99/mo
• Free tier unknown
• API available

Best for: Developers and agent builders who need structured Walmart catalog and pricing history without maintaining scrapers.