AI Agent Infrastructure
Last updated: January 12, 2026
Listed here are the best AI agent infrastructure platforms. Tools for AI agents like: email, browsers, APIs, databases, and schedulers - so agents can coordinate across systems.
Parseur: Extract structured fields from emails and attachments automatically
AI-driven email/PDF parser: build templates, extract key fields to JSON, then push results to Zapier/Sheets/CRMs or your own webhook—perfect for lead, order, and ops pipelines.
"Best no-code email/PDF parsing: train templates + AI extraction, then push to Zapier/webhooks; support is a standout"
"The top choice for this niche. Unlike others, it uses AI/OCR to actually understand and extract data from emails, not just dump raw JSON."
"True AI+OCR document parser with 98% time savings. Extracts data from emails/PDFs accurately. Template setup required but excellent support. Best fit for niche."
"Rated 5 for accurate AI-driven parsing and no-code ease, saving hours on data extraction; select for GDPR compliance and high accuracy in handling varied email formats."
Postmark: Turn inbound email into clean webhook events
Reliable inbound email processing that parses messages and attachments into structured payloads, making it easy for apps and agents to extract data and trigger actions.
"Best for transactional + inbound parsing: converts emails into clean JSON via webhooks and is known for reliability and docs."
"The gold standard for reliability. Its inbound parsing is fast and robust JSON, though it lacks the "intelligent extraction" layers of Parseur."
"Premium transactional email with industry-leading 99%+ deliverability and <1s delivery. Rock-solid since 2010 but sending only—zero parsing capability."
"Rated 3 for high deliverability (98.5%) but no native parsing for AI; suitable for outbound-focused agents needing reliable SMTP without complexity."
Resend: Receive inbound email and turn replies into webhook events
Developer email platform with inbound receiving: route emails and attachments to your endpoint as parsed payloads, so agents can triage, extract data, and respond.
"Developer-first email API; Inbound turns incoming mail into JSON webhooks fast—though inbound is still early access."
"Best-in-class developer experience. While primarily for sending, its Inbound Webhooks are reliable and clean for piping emails into AI agents."
"Modern email API with React templating and sub-second delivery. Exceptional DX and 99%+ deliverability. Sending-focused, not parsing. Best for dev teams."
"Rated 3 due to excellent sending reliability but weak parsing features for AI workflows; pick for developer-friendly SDKs and high deliverability if focus is outbound emails."
MailSlurp: Create inboxes in code and capture every inbound message
API-first inboxes for apps/tests: spin up real email addresses, receive emails/attachments via webhooks, and pull structured content for agent workflows.
"AI Transformers extract structured JSON from inbound emails + webhooks; great for testing/parsing, but mixed Trustpilot sentiment."
"Built primarily for QA/Testing, not AI production. Good for generating disposable inboxes to test your agent, but lacks native AI extraction logic."
"Developer-focused email testing tool with 18+ SDKs. Strong for QA/testing but limited production reviews and unclear scaling costs. Not true parsing."
"Rated 4 for strong developer tools and reliability in email testing, but inconsistent parsing for AI agents limits full use-case fit; choose for robust API and free tier if testing is key."
Unipile: Connect inboxes and capture messages into your product
Unified API to plug into email inboxes and messaging channels, fetch threads and attachments, and sync events—so agents can read, route, and act on communications.
"Unified email/messaging API for Gmail/LinkedIn/WhatsApp actions—great for building inbox features, but not purpose-built for parsing."
"Unique utility: it connects AI agents to user accounts (LinkedIn, WhatsApp, Gmail). Essential if your agent needs to act as a human user."
"Unified API for LinkedIn, WhatsApp, email—not traditional parsing. SOC 2 certified with 99.9% uptime. Best for CRM/ATS multi-channel integration."
"Rated 4 for unified API parsing across email/messaging with 99.9% uptime; pick for multi-channel automation if GDPR and no-scraping security are priorities."