The best audit log APIs for 2026: an honest comparison

“Audit logs” is two different products wearing one name. The first is audit logging of your infrastructure: CloudTrail recording what happened in your AWS account, Microsoft Purview and Google Workspace doing the same for your tenant, all of it draining into a SIEM your security team watches. The second is audit logs as a feature of your product: the screen in your SaaS where a customer’s admin can see that Alice invited Bob on Tuesday and somebody deleted the Q3 report at 2 a.m. Search results are wall-to-wall with the first kind. This article is about the second kind — services that give you an API to record what your users did, so every one of your customers gets a trustworthy trail of their own activity in your product.

Nobody builds this feature for fun. It gets scheduled the week a prospect’s security questionnaire asks for it, and it’s due the week after.

Full disclosure: I build one of the services on this list: Smpl Audit. Same rules as the cron services comparison (the one that later grew a live benchmark): I’ve put it where I think it belongs and said where the others are stronger.

The two kinds of audit log API

Bundled with your auth platform

Descope and Frontegg sell user management first. Audit logs come along as a module: your product’s events land next to the login events the platform already records, and the same embeddable admin portal your customers use for SSO setup shows them the trail. If you’re already a customer, it’s the path of least resistance — and a strange reason to switch auth providers if you’re not.

Standalone audit-log APIs

Pangea Secure Audit Log, Smpl Audit, and WorkOS Audit Logs are audit products in their own right, adoptable without touching your auth stack. You emit events over an API; querying, retention, export, and SIEM forwarding are the whole product. (WorkOS sells audit logs à la carte, though events hang off WorkOS “organizations,” so you’ll be creating those too.)

A few things that look like this category but aren’t: Auth0 log streams, Stytch event logs, and Clerk’s application logs all forward events about your auth tenant — useful telemetry, but there’s no API for recording that somebody deleted the Q3 report. If you’d rather run the whole thing yourself, Retraced is the open-source option (self-host only; its former commercial home, BoxyHQ, was absorbed into Ory). And there are newer entrants — AuditKit, Invoance — young enough that I’ll revisit them once they’ve shipped a year of changelog.

The field at a glance

Service	Type	Query API	Tamper proofs	Customer-facing viewer	SIEM streaming	Free tier
Descope	Platform	✓	✗	✓	⚠︎ Growth plan	Free plan
Frontegg	Platform	✓	✗	✓	✓	✗
Pangea	Standalone	✓	✓	✓	⚠︎ HEC only	PAYG
Smpl Audit	Standalone	✓	✗	✗	✓	1K/mo
WorkOS	Standalone	✗	✗	✓	✓	Metered

✓ first-class support  ·  ✗ not offered

Getting events back out: where the products actually differ

Getting events in is a commodity. Every service here takes a POST with an actor, an action, and a resource, and every one of them will happily accept millions of these. The differences are all on the way out, and they hide behind four separate questions:

1. Can your product ask the log a question — is there a live query API?
2. How expressive is the search — a flat filter list, or real nested conditions?
3. Can your customer take their data with them — bulk export, and in what format?
4. Can you stream events to the customer’s SIEM, and to which ones?

The answers vary more than you’d expect. WorkOS — the most enterprise-polished service on this list — has no query API at all: you can write events and stream events, but to read them programmatically you create an export job and poll for a CSV. Frontegg queries live but pages through results 200 at a time with flat filters. Pangea has a tidy field-prefix search grammar (actor:alice action:delete) but no nested boolean logic. Smpl Audit accepts full JSON Logic expressions — nested ANDs and ORs — alongside its column filters.

Service	Live query API	Search expressiveness	Bulk export	SIEM destinations
Descope	✓	Flat filters	⚠︎ Via widget	Webhook + connectors
Frontegg	✓	Flat filters + free text	CSV	6, production only
Pangea	✓	Field-prefix grammar	CSV + JSON	2, HEC protocol
Smpl Audit	✓	Filters + JSON Logic	CSV + JSONL	6 + custom HTTP
WorkOS	✗ Export jobs	Export filters	CSV	7, $125/mo each

Category 1: audit logs bundled with your auth platform

Descope

Descope treats audit as part of the furniture. Every authentication event is recorded already, and you add your product’s own events with a create-audit-event call on the Management API, a flow action, or the SDKs. The embeddable AuditManagement widget drops a tenant-scoped viewer straight into your app — React, Angular, Vue, Next.js, or plain JavaScript — where a customer’s admin sees logins and your custom events side by side, with export built in. A search API covers programmatic access, and the compliance shelf is fully stocked: SOC 2 Type 2, ISO 27001, FedRAMP High, HIPAA, GDPR. The fine print is the calendar: streaming connectors arrive with the Growth plan, which starts at $799 a month, and audit retention on every self-serve plan is one month. Auditors think in years. Best when you’re already on Descope for auth and your customers want a live window into recent activity rather than an archive.

Frontegg

Frontegg integrates audit logs into the embeddable admin portal it’s known for: events you POST show up in your customers’ self-service portal right next to Frontegg’s own auth events, with columns you configure in the builder and a download button for end users. The emission API is minimal — severity is literally the only required field — and the query API filters by time, actor, tenant, and free text, paging 200 records at a time. Streaming covers Datadog, AWS EventBridge, Splunk, Sumo Logic, Coralogix, and signed webhooks, though only from production environments. Frontegg claims SOC 2 Type 2 and ISO 27001. The catch is commercial: on the current pricing page, “Logs streaming / audit logs” has a checkmark in the Enterprise column and an empty cell in the free Pay-as-you-go column, and Enterprise is contact-sales. Retention is “customizable,” which is a word, not a number. Best when you’re already a Frontegg Enterprise customer — the module is good, and you’ve already paid for it.

Category 2: standalone audit-log APIs

Pangea Secure Audit Log

Pangea’s Secure Audit Log is the service in this lineup that treats tamper evidence as the product. Events land in a Merkle tree; the API returns membership and consistency proofs; root hashes are published to Arweave so not even Pangea can quietly rewrite history; and the embeddable React viewer (@pangeacyber/react-mui-audit-log-viewer) verifies those proofs client-side. Schemas are configurable, export does both CSV and JSON, and retention is tiered by temperature: hot data is searchable for at most 14 days, warm storage keeps up to ten years, and cold archives are retrieved by emailing support. SIEM forwarding speaks HEC to exactly two destinations: Splunk and CrowdStrike NG-SIEM. About that — CrowdStrike acquired Pangea in September 2025. The docs now carry CrowdStrike branding, the product is being folded into an AI-security story, and the standalone pricing pages redirect to CrowdStrike’s. The four billing meters are documented; the prices load in a spinner. Best when the audit log is the deliverable — regulated industries, disputes, legal evidence — and cryptographic verifiability outranks everything else on this page.

Smpl Audit

Smpl Audit is API-first: record events over REST or six SDKs (fire-and-forget with buffering, retries, and idempotency keys), query them back with column filters or full JSON Logic expressions, and pull bulk exports as CSV or JSONL from a signed URL. Forwarders stream to Datadog, Elastic, Honeycomb, New Relic, Splunk HEC, Sumo Logic, or any custom HTTP destination, each with JSON Logic filters, JSONata transforms, per-environment overrides, and replayable failed deliveries — but they require the Enterprise plan at $249 a month. Retention runs from 30 days on the free tier (1,000 events a month) to ten years on Enterprise, and environments are first-class: the same event stream, credential scoping, and forwarder config split cleanly across production and staging. There’s a CLI and a Terraform provider. Now the honest column: storage is append-only by design, but there are no cryptographic proofs — if you need to hand an auditor a verifiable chain, that’s Pangea. The event viewer lives in the smplkit console for your team, so putting a trail in front of your customers means building a page on the query API. And there are no compliance certifications to report yet.

WorkOS Audit Logs

WorkOS Audit Logs is the enterprise-polish option. Events are validated against per-action schemas that are versioned and immutable, with metadata attachable to the event, the actor, and each target (50 keys, 40-character names, 500-character values). Idempotency keys are supported, official SDKs cover 7 languages with audit-log examples, and there’s a real CLI. Your customers get a hosted Admin Portal viewer with CSV export behind a setup link, and a React widget now lets them configure their own SIEM stream from inside your app. The streaming menu is the widest in the lineup — Datadog, Splunk, S3, Google Cloud Storage, Microsoft Sentinel, Snowflake, and generic HTTPS — at $125 a month per connection, with storage at $99 a month per million events. WorkOS claims SOC 2 Type 2, GDPR and CCPA compliance, and a HIPAA BAA for enterprise. Two genuine surprises in the fine print: retention is a choice of exactly two numbers, 30 or 365 days, and there is no query API. Your product can write events and stream events, but to read them back you create an export job, poll until the CSV is ready, and download the file before its link expires ten minutes later. Best when you’re selling to enterprises, the audit trail is for your customers’ security teams rather than your own product logic, and you want the portal and SIEM story handled by someone who’s done it a hundred times.

Which should you pick?

If you’re already on Descope or Frontegg for user management, use the audit module you already have — that’s the entire point of a platform. Descope’s is genuinely pleasant and starts free; just know that a month of history is a window, not an archive. Frontegg’s is solid if you’re on the Enterprise plan, which is the only plan that has it.

If tamper evidence is the actual requirement — regulated data, disputes, anything a lawyer might one day subpoena — pick Pangea. Nothing else in this lineup offers cryptographic proofs, and Pangea’s run all the way down to the embedded viewer. Go in knowing the SIEM menu is two items long and the company is mid-digestion into CrowdStrike.

If you want the safe enterprise choice, it’s WorkOS, plainly. Hosted customer portal, the widest SIEM menu, schema governance, and a pricing page with two numbers on it. Accept that your own product can’t query the log — WorkOS assumes the readers are your customers’ SIEMs, not your code.

If you want a standalone log your product can actually read — JSON Logic search, JSONL export, forwarders with filters and transforms, environments, SDKs, a CLI, Terraform — Smpl Audit deserves serious consideration. If you need a drop-in viewer for your customers on day one, we don’t have one; WorkOS, Frontegg, Pangea, and Descope all do.

One more thing

Every claim above was checked against live vendor documentation and pricing pages the week this was written. Comparison tables rot — vendors ship, plans get renamed, checkmarks move between columns. If you catch a cell that’s gone stale, tell me and I’ll fix it.