Quell vs Marker.io (2026)
Quell is an agent-native Marker.io alternative: cloud at a flat $4/user/month, with a full REST API and MCP server included on every plan, and console logs and network capture included from the start. Marker.io is a polished visual feedback tool built for human triage teams, and it does that job well. The gap is the agent layer: Marker.io has no API, no MCP server, and no way for a coding agent to read a bug report without someone copying and pasting it. If your team uses Claude Code, Cursor, or any MCP-capable agent, Quell gives those agents first-class access to the feedback they need to open the fix. If your workflow is entirely human-driven and you want a mature, proven product, Marker.io may be the stronger choice today.
Side by side
Quell and Marker.io, feature by feature.
| Feature | Quell | Marker.io |
|---|---|---|
| Entry price | Cloud $4/user/month (flat, no per-event metering) | From $39/month (Starter) |
| REST API access | Included on every plan | No API available |
| MCP server | Yes: quell mcp, 10 tools, stdio transport | No |
| CLI | Yes: quell binary, zero extra dependencies | No |
| Console log capture | Yes, included on every plan | Gated to higher-tier plans (from $149/month) |
| Network request capture | Yes, included on every plan | Gated to higher-tier plans (from $149/month) |
| Trust model | Yes: public, identified, reporter, agent, admin; gates auto-routing | No equivalent |
| Agent-readable export | Yes: Markdown /context export; scoped API keys for agents | No |
| Self-hosting | Coming post-launch: one Dockerfile, SQLite or Postgres, $5 VPS | Not available (cloud only) |
| Screenshot + annotation | Yes, included | Yes (core feature, polished) |
Pricing and features verified July 2026 from marker.io/pricing and third-party reviews. Confirm at marker.io before relying on specific numbers. Quell is pre-product software; pricing and features are subject to change.
The other side
Where Marker.io wins.
Marker.io has been in market for several years and has a mature, polished product. If any of the following describes your team, Marker.io is likely the better fit right now.
You want a proven, established tool. Quell is pre-product with zero external paying users at the time of writing. Marker.io has a track record and a support organisation behind it.
Your reporters cannot install anything on the page. Marker.io's browser extension lets reporters capture bugs on any site without the product owner adding a script snippet. Quell's widget requires a snippet in your page.
You need external guest reporters. Marker.io supports a guest reporter flow where external clients or stakeholders can file bugs without signing up for an account. Quell's widget supports public (unauthenticated) reports, but the guest experience in Marker.io is purpose-built for external agencies and client review cycles.
You need session replay. Marker.io records session video alongside screenshots. Quell's screen recording is opt-in per report (the reporter chooses to record), not an always-on session replay.
You need Monday.com, Trello, or Asana sync. Marker.io supports a wider range of project management integrations. Quell integrates with GitHub and Linear; Jira, Monday.com, Trello, and Asana are not currently on the roadmap.
The case for Quell
Where Quell wins.
Marker.io has no API
Marker.io offers no REST API on any plan. If you need a coding agent to read a bug report, pipe feedback into a custom dashboard, or trigger downstream automation, Marker.io cannot do it. Quell's REST API is included on every plan with scoped keys (feedback:read, feedback:comment, feedback:integrations, and others). An agent can read the full report, post a comment, update the status, and open a GitHub issue, all without admin access and without a human in the loop.
MCP server and CLI included
quell mcp is a stdio MCP server with 10 tools. A Claude Code agent, a Cursor agent, or any MCP-capable runtime can read feedback in Markdown, post comments, update status, and open GitHub or Linear issues. No human copy-pasting required. Marker.io has no MCP server and no agent interface of any kind. For teams running an agent-native feedback platform, this is the category difference.
Console logs and network capture are not behind a paywall
Marker.io gates console log recording and network request capture to higher-tier plans (from around $149/month). These are not optional extras for agent-driven triage: they are the fields a coding agent reads to understand what broke and why. Quell captures console logs and failed network calls on every plan, and includes them in the Markdown context export your agents use. See how Claude Code reads a Quell report for a concrete walkthrough.
Cloud pricing: $4/user versus $39/month to start
Quell Cloud is $4 per user per month: no per-event metering, no usage overage, no token charges. Marker.io starts at around $39/month for its Starter plan. The tier that includes console logs and network capture starts at around $149/month, nearly 37 times more per user at a two-person team. For teams that need the full context Quell captures from the start, the price gap is not a feature trade-off; it is the same feature at a fraction of the cost.
Trust-aware routing
Quell's trust model (public, identified, reporter, agent, admin) determines what happens to a submission automatically. Public widget reports go to human triage. Agent submissions can be routed directly to GitHub or Linear. Admin keys bypass the queue. Marker.io has no equivalent trust layer: all submissions enter the same inbox regardless of source.
Built with itself
Quell's own development uses the Quell widget and MCP server to capture and triage bugs during development. That is an honest proof point, not a marketing claim.
Making the move
Switching from Marker.io.
Quell's widget installs as a single script snippet in your page. If you are already embedding Marker.io's snippet, replacing it takes a single change to your page markup. The admin inbox, GitHub and Linear push, and trust levels all work from day one. There is no data migration required; you start with a clean project.
If you are evaluating the switch, the honest recommendation is to run Quell in parallel on a single project first. Cloud setup takes about ten minutes. If your team uses a coding agent, add the MCP server immediately: the difference in the agent's first response to a structured report versus a screenshot title is apparent in the first session. See Quell pricing for current options.
FAQ
Straight answers.
Is Quell a good Marker.io alternative?
Quell is a strong Marker.io alternative if your team uses coding agents or needs a REST API included on every plan. It is a newer, pre-product tool with no external paying users yet, so if you need a proven, mature product, Marker.io has the track record advantage. The agent-native features (MCP server, CLI, trust model, Markdown context export) have no Marker.io equivalent.
Does Marker.io have an API?
No. Marker.io does not offer a REST API on any plan. If you need programmatic access to your feedback data (to feed a coding agent, build a custom dashboard, or connect to a non-listed integration), Marker.io cannot do this. Quell includes a fully scoped REST API on every plan, with narrow API keys (feedback:read, feedback:comment, and others) so agents get the access they need without admin credentials.
How much cheaper is Quell than Marker.io?
Quell Cloud is $4 per user per month, flat. Marker.io's Starter plan is around $39/month. The Marker.io tier that includes console logs and network request capture starts at $149/month. Quell includes console logs and network capture from the first paid plan with no tier gating. Prices verified July 2026; confirm at marker.io/pricing before making a decision.
Does Marker.io capture console logs and network requests?
Yes, but only on higher-tier plans from around $149/month. Quell's widget captures console logs, failed network calls, and page and system state on every plan. For teams that need a coding agent to understand a bug from the full context (not just a screenshot), these fields are not optional. They are what the agent reads to open the right fix.
Can coding agents like Claude Code read Marker.io feedback?
No. Marker.io has no API, no MCP server, and no agent-readable export format. The only way to get a bug from Marker.io to a coding agent is to copy and paste manually. Quell's MCP server (quell mcp, 10 tools, stdio transport) gives Claude Code, Cursor, and any MCP-capable agent direct read access to feedback in Markdown, with tools to comment, update status, and open GitHub or Linear issues without human intervention.