The 5 best Interview Solver alternatives in 2026

Interview Solver has a clear pitch: a desktop overlay (plus a phone "Companion Mode" and an iOS app) that helps you through coding interviews. If you only ever do LeetCode-style screens and you like the second-device idea, it can fit.

A lot of people end up looking for something else, and the reasons are fairly consistent.

Why people look for an Interview Solver alternative

• It is not always "real-time." Reviewers report that it mainly transcribes and often needs a manual trigger to produce an answer, rather than streaming guidance as the conversation happens.
• Stability on hard questions. Users report lag, freezes, and crashes on the harder problems, which is when it matters most.
• Inconsistent code. Several reviewers note the generated code can be hit-or-miss.
• Clunky UX. The overlay is described as eating a lot of screen space, and the App Store app reportedly shipped with broken functionality at one point (the developer says it has since been fixed).
• Coding-only. It is built for technical screens. If you also have behavioral rounds, recruiter calls, meetings, or sales calls, you need a second tool.

Pricing and features change, so verify the latest details on each vendor's own site before you buy.

The short list

1. Assistly: the best all-around alternative

Assistly is a native desktop app for macOS (Apple silicon, macOS 13+) and Windows 10/11. It is an always-on-top overlay that runs alongside Zoom, Google Meet, Microsoft Teams, Webex, Slack huddles, and phone calls. It is not a notetaker bot and never joins your call as a participant.

Where Interview Solver is coding-only and trigger-based, Assistly is built for every live conversation and streams guidance token-by-token as people speak.

What stands out:

• Real-time. Guidance streams as the conversation happens, with low latency. There is no manual "answer now" tap.
• Broader than coding. Job interviews (technical and behavioral), meetings, and sales calls, rather than only LeetCode screens.
• Multi-speaker context. It separates your voice from others and tracks who said what, which helps on busy group calls.
• Works with headphones on. It captures the call's own audio, not just your mic.
• Undetectable for a specific, verifiable reason. The overlay is excluded from screen capture at the OS level, so it never shows up in a screen share, a recording, or a proctoring tool's frame. It is on your physical screen but withheld from the capture buffer.
• Renamable app and custom icon. You can rename Assistly and swap its icon, so it does not appear as a recognizable assistant in Activity Monitor or Task Manager. That defeats the name-based process scans some proctoring platforms (e.g. HackerRank, Codility) run.
• Personas and knowledge modes. Build a persona from your CV, notes, and docs so answers sound like you, and switch knowledge modes for different situations.
• Customizable hotkeys to show, hide, and drive the overlay.
• Automatic notes and action items after every session.

Pricing is flat. Free gives you 3 sessions/month (capped at 15 minutes each), the full feature set, and no card required. Pro is $14.99/month for unlimited sessions with no time cap. Every feature is included on both plans, and there is no separate "undetectability" upsell.

Caveats. Audio streams to the cloud, where transcription and inference run, so this is not on-device processing. Screen-capture exclusion is real but conditional: newer macOS capture paths (ScreenCaptureKit on macOS 15+) can composite visible windows before capture, so invisibility depends on how current a tool stays with OS updates. We keep ours current, but no overlay should be sold as a constant. You control data retention and can delete sessions and notes anytime.

If you want the deep side-by-side, see our Assistly vs Interview Solver breakdown.

2. LockedIn AI: if you specifically want live coding

LockedIn AI is a real-time interview and meeting copilot for macOS and Windows (beta), with a Chrome extension. Reported pricing is around $49.99/month (down to ~$29.99 quarterly), with a lifetime tier up to ~$1,499.

Strength: strong live coding support is the most consistent praise.

Attributed weaknesses: Trustpilot and other reviewers report a 4–5 second "latency stare" before answers, generic GPT-style responses, and refund/cancellation complaints. The browser extension is reportedly visible on screen share, and reviewers note it can be detected via process-list scans on HackerRank and Codility.

3. Cluely: the biggest brand

Cluely is the most recognizable name in this space (a16z-backed). It is a real-time overlay for macOS, Windows, and iOS, and it goes broad: sales, meetings, and interviews, plus CRM and enterprise features. Reported pricing spans a Free tier (~5 AI responses/day), Pro at ~$20/mo, "Pro + Undetectability" at ~$149.99/mo, and Enterprise at ~$200/seat.

Strength: the broadest feature surface and the most mindshare.

Attributed weaknesses: the undetectable feature is gated to the ~$149.99/mo tier. Trustpilot sits around 1.8/5, dominated by billing, refund, and cancellation complaints. Independent tests measured 5–10s+ latency against an advertised ~300ms, and reviewers report it being flagged within seconds on CoderPad and HackerRank. In March 2026, founder Roy Lee told TechCrunch that a prior $7M ARR figure was fabricated.

4. Final Round AI: if you want mock-interview practice

Final Round AI is an all-in-one job-search suite: a live "Interview Copilot," AI mock interviews, a résumé builder, and auto-apply. It runs as a web app, a Chrome extension, and a macOS/Windows "Stealth" desktop app. Reported pricing is around $99–$149/month monthly, ~$500/year, with add-ons extra.

Strength: the mock-interview practice is well praised, and useful if you want to rehearse before the real thing.

Attributed weaknesses: Trustpilot reviewers report difficulty cancelling and rebilling after cancellation, refunds denied despite an advertised "3-day guarantee," and aggressive trial auto-charges. The live Copilot is described as generic and laggy and reportedly stops mid-interview at times, and the browser version is detectable on screen share.

5. Ultracode: if coding depth is everything

Ultracode is a coding-interview "undetectable co-pilot" with native Windows and macOS apps, and it earns praise for strong coding and system-design answers via top-tier models. Reported pricing is around $899 one-time "lifetime," though buyers report a volatile $650–$1,799, and it is non-refundable.

Strength: depth on hard coding and system-design questions.

Attributed weaknesses: there are documented "caught" reports on forums. A TeamBlind user was caught on a Meta phone screen due to repeated screen-switching, and others were flagged on HackerRank with offers withdrawn. Reviewers also report lag, freezes, and crashes. It is non-refundable, with refund requests denied, and it is weak for behavioral interviews.

How to choose

• You do more than coding screens (behavioral, meetings, sales): Assistly.
• You want real-time guidance without a manual trigger: Assistly or Cluely.
• You want to practice before the real thing: Final Round AI's mock interviews.
• You only ever do live coding and want a coding specialist: LockedIn AI or Ultracode (verify detection and refund terms first).

One more thing worth saying plainly: an undetectable overlay is a tool to help you be prepared and present, not a license to ignore the rules. Use any of these within the rules of the interview, meeting, or call you are in, and respect recording-consent laws. Whether AI is even allowed depends on the employer. Some now permit it, some ban it.

If you looked at Interview Solver because of coding screens, you may be weighing coding-specialist tools too. See our best Interview Coder alternatives roundup, and the full Assistly vs Interview Solver comparison.

Try Assistly free

The fastest way to decide is to run it on a real call. Create a free Assistly account for 3 full-featured sessions a month with no card required, and upgrade to Pro at $14.99/month only if you want unlimited.