Comparison
AI coding interview assistants compared: price, models, platforms
Six AI coding interview assistants, compared on how they bill you, the cheapest paid price each one shows, whether there's a free option, which platforms they run on, whether they name their AI models, and whether you can bring your own API key. Every row comes from the vendor's own site as checked on Nov 14, 2026.
Disclosure: we make Interview LLM, one of the products in this table. Details about the other products come from their own websites as checked on Nov 14, 2026. Prices change often, so confirm on each vendor's page before buying. Product names are trademarks of their owners, and this page isn't affiliated with any of them.
The comparison table
"Cheapest paid price" is the lowest paid price each vendor displays, not necessarily the cheapest way to cover a full job search. "Not named" and "Not mentioned" mean we couldn't find it on the pages listed in the sources.
| Tool | Pricing model | Cheapest paid price shown | Free option | Platforms | AI models named | Own API key | Focus |
|---|---|---|---|---|---|---|---|
| Interview Coder | Monthly subscription or lifetime license | $299/month (lifetime $799 one-time) | Free download; AI features need a subscription | Windows, Mac | Not named ("fine tuned AI models") | Not mentioned | Coding and other interview types; audio support |
| Interview Solver | Subscription | $59/month ($149 every 3 months) | Free tier, limits not stated | macOS, Windows | Not named | Not mentioned | Coding and system design; voice transcription |
| Final Round AI | Subscription | "$25+/mo" (a "from" price) | Free plan for prep tools; live sessions need Pro | macOS 14.4+, Windows | Not named | Not mentioned | Many interview types, practice interviews |
| LockedIn AI | Credits, unlimited (billed every 3 months) or lifetime | Prices didn't load when checked | Free plan, no card | Windows 10+, macOS 13.1+, iPhone, Android, browser | Not named | Not mentioned | Many interview types, meetings, career tools |
| Cluely | Subscription | $19.99/month (Pro) | Starter: limited responses and notes | Mac; mobile page; Windows not shown on pricing page | Not named ("latest AI models") | Not mentioned | General meeting assistant |
| Interview LLM | One-time license plus your own API usage | $39 one-time (shown against $69) | None | Windows, macOS (some Sonoma versions unsupported) | Your choice of OpenAI, Claude or Gemini models | Yes, required | Coding interviews and online assessments |
Notes on each tool
Interview Coder
Monthly Pro is $299 with 1,000 usage credits; Lifetime Pro is $799 once. The free download lets you explore the app, but AI features need a paid plan. The refund policy says all sales are final. Its plan cards list audio support, 24/7 support and "20+ undetectability features". More in Interview Coder pricing, explained.
Interview Solver
A native desktop app for macOS and Windows at $59/month or $149 per 3-month "Interview Cycle", cancellable from the billing portal. Listed features include real-time code generation and system design help, transcription of interviewer and candidate audio, a phone companion mode with remote controls, and uploading your resume or job description for context. The vendor also advertises invisible screen sharing and hotkeys. See Interview Solver alternative.
Final Round AI
One of the broadest in the group: behavioral, coding, system design, phone and HireVue interviews, with practice mode across eight scenarios. Pro ("$25+/mo", with a "Save up to 40%" badge; we couldn't see the billing period behind the $25) adds unlimited live Interview CoPilot sessions, Stealth Mode (on by default), AI debriefs and screen help with auto-capture. The site says there's no free trial of live sessions. See Final Round AI alternative.
LockedIn AI
Three paid plan types: Credits (400 minutes of live interview help a month, credits never expire, top-ups available), Unlimited, and Lifetime. Subscriptions are billed every 3 months. The pricing page showed "Loading prices" when we checked, so we can't quote a number. It lists a money-back guarantee and says its stealth mode can't guarantee undetectability on every platform. See LockedIn AI alternative.
Cluely
Cluely positions itself as an AI meeting assistant that listens in real time and suggests answers, notes and next steps, alongside Zoom, Teams, Google Meet and others. Pro is $19.99/month; "Pro + Undetectability" is $149.99/month. It isn't built specifically for coding rounds. See Cluely alternative.
Interview LLM
Ours. You screenshot the problem with a global shortcut, the model you picked extracts it, and you get a solution with an explanation and time and space complexity; you can also screenshot errors or your code for debugging help. You can choose a different model for each stage. Your key and session data stay on your machine, the full source code is included, and refunds are available within 7 days with a recording showing it doesn't work. There's no free tier, and it doesn't listen to audio.
How to choose an AI coding interview assistant
- Count the months. A subscription you need for one interview is cheap; one you keep for a six-month search isn't. Multiply the monthly price by how long you expect to search, and compare it with one-time options.
- Decide whether you need audio. If you want a tool that works with interview audio, look at the ones that list it: Interview Coder (audio support), Interview Solver (voice transcription), and Final Round AI, LockedIn AI and Cluely (all three say they listen to the live conversation). If your rounds are mostly coding problems on screen, a screenshot-based tool covers it.
- Decide how much model choice matters. Only Interview LLM lets you pick the model and see what it costs per request. The trade-off is setting up an API account with a provider. The bring-your-own-key guide explains the setup and the costs.
- Check the refund policy. Interview Coder's is no refunds. LockedIn AI's pricing page shows a money-back guarantee, and Interview LLM refunds within 7 days with a recording showing it doesn't work. The others don't state one on the pages we checked.
- Check your platform. Final Round AI needs macOS 14.4+, LockedIn AI macOS 13.1+, and Interview LLM doesn't support some macOS Sonoma versions.
- Know the rules. Several vendors advertise stealth features; we make no such claims. Many employers and assessment platforms prohibit outside help during live interviews and online assessments, so follow the rules you agreed to. For practice, any of these can help you study worked solutions before re-solving problems yourself.
If a one-time, bring-your-own-key desktop app fits how you prepare, you can see Interview LLM's pricing. For system design rounds, our sister app System Design LLM works the same way.
Sources (checked Nov 14, 2026)
- Interview Coder: interviewcoder.co and refund policy
- Interview Solver: interviewsolver.com/pricing and interviewsolver.com
- Final Round AI: finalroundai.com
- LockedIn AI: lockedinai.com/pricing and lockedinai.com
- Cluely: cluely.com/pricing and cluely.com
FAQ
Which AI coding interview assistant is cheapest?
It depends on how long you need it. Cluely Pro has the lowest monthly price shown ($19.99), but it's a general meeting assistant. Final Round AI's Pro starts at "$25+/mo". Interview LLM is $39 once plus your own API usage; assuming about $9.30 a month in API costs, it's cheaper than a $25 monthly plan from month 3, a $20 plan from month 4, and a $59 or $299 plan from the first month.
Which tools let me use my own OpenAI, Claude or Gemini API key?
Of the six we checked, only Interview LLM. The other vendors' pages don't mention bringing your own key.
Which AI models do these assistants use?
Interview LLM lets you choose OpenAI, Anthropic or Google models. The others don't name their models on their pricing or home pages; they use phrases like "latest AI models" or "fine tuned AI models".
Do any of them have a free plan?
Interview Solver, Final Round AI, LockedIn AI and Cluely list free plans with limits. Interview Coder's free download needs a subscription for AI features. Interview LLM has no free tier or trial.