Quick Answer
For interview-shaped practice, the strongest AI tools are Huru (a free AI interviewer that scores every answer), Interviews by AI (questions built from a job description; 3 free a month, Pro $9 a month) and EngineerSpeak (AI technical mock interviews by voice, with optional English feedback). For daily speaking volume, AI tutors such as Praktika, Loora and Talkpal work, and ChatGPT Voice is a flexible option if you write your own prompt. Mockly English's free Mini Apps check the English of your interview answers with no account. AI cannot tell you whether your technical answer works, so add one human mock with a Mockly engineer-coach before the real loop.
What makes Mockly English different
Mockly English is built for one job: getting non-native engineers and data professionals through tech interviews, and through meetings, in English. Your coach is a practising UK data engineer who also teaches English. They run the real round (coding, system design, SQL and data, behavioural, HR), then correct your English line by line and have you say it again. The first 30 minutes are free with no card; after that it is $50 a session, with no subscription.
⚡ Quick Stats
How We Picked
This list is for non-native English speakers preparing for tech interviews: software engineers, data engineers, data analysts and similar roles. We kept tools that make you speak (typing answers is a different skill), that are shaped like an interview or like English practice you can point at an interview, and that publish what they do. Facts and prices come from each provider's own site or app store listing, checked between 24 October and 10 November 2026. Prices change often, so check before you pay.
We make Mockly English, so it is in the list. We have tried to say plainly where other tools do a job better or cheaper.
The AI Tools Compared
| Tool | Best for | Price (as checked) | Feedback on your English | Read more |
|---|---|---|---|---|
| Mockly Mini Apps | Checking the English of interview answers: tell me about yourself, STAR stories, 60-second answers, filler words, pronunciation, explaining LeetCode and system design | Free, no account | Yes, the main focus | Try one |
| Huru | Unlimited behavioural reps with a live AI interviewer; every answer scored out of 100 | Free for job seekers | Grammar and articulation | Huru review |
| Interviews by AI | Practising for one specific job description, with a timer | 3 free questions a month; Pro $9/month | Delivery and filler words | Interviews by AI review |
| EngineerSpeak | Technical questions by voice for developers, data scientists and ML engineers | 1 free session; paid prices not shown | Optional: grammar, clarity, vocabulary, phrasing | Mockly vs EngineerSpeak |
| Hello Interview Live Practice | AI system design mock with a hire / no-hire call for your level | Part of Premium: $59/month, $119/year or $399 lifetime (list prices) | Rates communication | Mockly vs Hello Interview |
| Final Round AI | Practice interviews in 8 scenarios; also sells a live interview copilot | Free plan; $150/month monthly, $25/month billed yearly | Not described | Mockly vs Final Round AI |
| ChatGPT Voice | Free-form role play that you set up with your own prompt | Limited Live access on Free; 3 hours a day on Go and Plus | Only if you ask for it | Mockly vs ChatGPT Voice |
| Praktika | Daily speaking with AI avatar tutors | About $8/month (homepage) | Pronunciation, grammar, word choice | Mockly vs Praktika |
| Loora | AI conversation practice, with Business English modules for interviews | US App Store: $14.99–$19.99/month | Yes, general English | Mockly vs Loora |
| Talkpal | Speaking and writing practice in real-life scenarios | Free plan with limits; Premium price not shown | Real-time feedback | Mockly vs Talkpal |
| BoldVoice | Accent and pronunciation training | US App Store: from $14.99; 12-month Premium $149.99 | Pronunciation and stress | Mockly vs BoldVoice |
| ELSA Speak | Pronunciation drilling at the sound level | Free tier plus paid subscription | Pronunciation | Mockly vs ELSA Speak |
Google Interview Warmup used to be on lists like this one. It is gone: its page now redirects to a general Grow with Google article. See Google Interview Warmup alternatives for what to use instead.
Free Mini App
Check your tech interview English for free
Say a real interview answer and see which phrases sound unclear, translated or junior. No card and no account.
Try the Mini AppWhich Tool for Which Job
- Behavioural rounds (STAR): Huru for volume, then Mockly's STAR story rewriter to fix the English of each story.
- One job description: Interviews by AI. Paste the job post and practise the questions it is likely to produce.
- Technical questions by voice: EngineerSpeak for backend, data science and ML questions; Hello Interview Live Practice for system design.
- Explaining code out loud: Mockly's explain LeetCode in English and explain system design in English Mini Apps.
- Tell me about yourself: Mockly's answer in 60 seconds drill, then say it to Huru until it sounds natural.
- Pronunciation: ELSA Speak or BoldVoice for sounds; Mockly's interview pronunciation coach for the words that come up in tech interviews.
- General speaking confidence: Praktika, Loora or Talkpal, 15 minutes a day.
Insight
Final Round AI's main product is a copilot that suggests answers during a live interview. Practising with suggested answers on screen trains you to read, not to speak. Use its practice mode, or a different tool.
What AI Practice Misses in a Tech Interview
AI tools are good at volume and at surface English: filler words, grammar slips, missing structure. In a tech loop, the expensive mistakes are elsewhere.
- Technical correctness. A fluent answer about a cache that would not work still fails. Most AI tools score how you said it, not whether the design holds up.
- Real follow-ups. Interviewers push on the weakest part of your answer. An AI interviewer usually moves to the next question.
- Phrases that change meaning. “Actual” for “current”, or “we” where the interviewer needs “I”, can cost a level. AI feedback often misses these because the sentence is grammatical.
- How you sound to a UK or US interviewer. Directness, hedging and seniority signals are cultural. See 20 English mistakes in tech interviews.
- Recovery. What to say when you blank. That is easier to learn with a person who stops you and has you try again. See what to say when your mind goes blank.
A Weekly Plan With AI and One Human
- Week 1: Book Mockly's free 30-minute trial. A coach hears you answer and tells you your three biggest English habits.
- Weeks 1–3, daily: 20 minutes on Huru or Interviews by AI for behavioural questions, aimed at those three habits.
- Weeks 1–3, three times a week: explain one LeetCode problem or one system design out loud with a Mockly Mini App, or with EngineerSpeak.
- Week 3 or 4: one full mock round per round type with a Mockly coach (coding, system design, behavioural). That is a 5-pack for most loops.
Mockly prices (as of November 2026)
- Mockly: a free 30-minute trial with a coach on Google Meet. No card and no subscription.
- Mockly: live 60-minute 1:1 sessions are pay-as-you-go. One session is $50; packs of 5 ($237.50), 10 ($450) or 20 ($850) cost less per session. Credits last 12 months and work with either coach.
- Mockly: Premium is the self-study course at $9.99/month, or $59.99/year, with a 7-day free trial. It does not include a coaching session and you do not need it to book one.
Verdict
Use AI for repetition and a human for judgement. Huru and Interviews by AI are the best free and cheap AI interview tools for non-native speakers; Mockly's Mini Apps check your English for free; and one or two sessions with an engineer-coach catch what no AI tool will tell you.
Talk to an engineer-coach first
Book a free 30-minute Google Meet with Sophie or Tom. No card, no subscription. You practise a short interview-style prompt in English and leave with a plan for what to work on next.
Book a Free Trial →