# Mockly vs EngineerSpeak (2026): AI Technical Mock Interviews or a Human English Coach? > EngineerSpeak runs AI technical mock interviews by voice for developers and data scientists; Mockly's engineer-coaches run full rounds and correct your... - **Page type:** Blog post - **URL:** https://app.mocklyenglish.com/blog/mockly-vs-engineerspeak - **Last updated:** 2026-11-02 - **Author:** Tom O. - **Published:** 2026-11-01 - **Topic:** Comparisons Mockly English is three things: 1. Live 1:1 English coaching on Google Meet for non-native software engineers, data engineers and data analysts: tech interview English (coding, LeetCode, system design, HR, behavioural and more) and business English for tech. Coaches are practising data engineers who also teach English. Free 30-minute trial, no card needed. Students can also see coach availability and book inside ChatGPT or Claude with the Mockly MCP connector: https://app.mocklyenglish.com/ai. 2. Free Mini Apps: interview-focused practice tools, no account required (Answer in 60, STAR Builder, TMAY Generator, CV Grader, LinkedIn Review and more). 3. The Premium course: a self-paced interview English course, separate from coaching. It does not include a session. Quick Answer **EngineerSpeak is an AI mock interview tool for software developers, data scientists and ML engineers: you answer technical questions by voice, the AI asks follow-ups and scores correctness and completeness, with optional English feedback. It offers one free session with no card. Mockly is live 1:1 coaching with two UK data engineers who run coding, system design and behavioural rounds and correct your English, at $50 a session with a free 30-minute trial. Use EngineerSpeak for unlimited technical Q\&A reps; use Mockly to rehearse full rounds with a person.** ⚡ Quick Stats Pay As You Go1-on-1 coaching sessions - no subscription required AI, voice answersEngineerSpeak format 1 free sessionEngineerSpeak, no card Engineer-coach, 60 minMockly format $50, or free 30-min trialMockly, packs cost less ## What EngineerSpeak Is These facts come from engineerspeak.com, checked on 1 November 2026. - AI mock interviews for software developers, data scientists and machine learning engineers. - Tracks cover software development, data science, machine learning, and backend tracks for Java, Node.js, Python, PHP and C#. You pick Junior, Middle or Senior. - Two modes: a learning mode where you answer single questions and get immediate feedback, and an AI mock interview mode with questions matched to your level. - You answer by voice. The AI asks follow-up questions about constraints, implementation details, architecture and trade-offs. - Feedback covers correctness, completeness, missing concepts, depth and trade-offs. Optional English feedback covers grammar, clarity, professional vocabulary and natural phrasing. - The site language and interview language can be set separately. - One free session, no credit card. Runs in the browser. Audio is deleted after transcription. Insight EngineerSpeak's homepage did not show paid plan prices when we checked, so we do not quote one. ## What Each One Checks | | EngineerSpeak | Mockly | | -------------------------- | ---------------------------------------------------------------- | ------------------------------------------------------------------------------ | | Who asks the questions | AI | A practising data engineer (Tom or Sophie) | | Question types | Technical knowledge questions by role and level, with follow-ups | Full rounds: coding, system design (on Excalidraw), behavioural and leadership | | Technical feedback | Correctness, completeness, missing concepts, trade-offs | Whether the approach and explanation would pass, from an engineer | | English feedback | Optional: grammar, clarity, vocabulary, phrasing | The main focus: the exact phrases that sounded unsure, and what to say instead | | Behavioural / STAR answers | Not described on the site | Yes, including Amazon-style leadership questions | | Availability | Any time, in the browser | Booked 60-minute sessions on Google Meet | | Price | 1 free session; paid prices not shown | $50 a session; packs from $42.50 a session; free 30-minute trial | ## Where an AI Technical Interviewer Helps Technical knowledge questions are a numbers game. If you need to explain the difference between a process and a thread, how an index works or when to use a message queue, you get better by answering many of them out loud. An AI interviewer that asks follow-ups and never gets tired is a good fit for that volume, and EngineerSpeak's role and level tracks keep the questions relevant. Speaking your answers matters even more if English is not your first language. Our guide to explaining code out loud in English has phrases you can practise in those sessions. ## Where a Human Coach Helps A real interview loop is more than a set of knowledge questions. A system design round needs you to steer a 45-minute conversation. A behavioural round needs a story with a clear result. An interviewer also reacts to how you sound: hedging, over-apologising or a long silence while you translate in your head. In a Mockly session, the coach runs the round as an interviewer would, then stops and goes through it with you: the sentences that made your answer sound junior, the order that would have been clearer, and a second attempt in the same session. You leave with a drill list for the next week. ## EngineerSpeak and Mockly: Pros and Cons EngineerSpeak PROS: unlimited technical Q\&A practice by voice; role and level tracks; AI follow-ups on trade-offs; optional English feedback; one free session with no card; works in the browser. CONS: AI, not a person; built around knowledge questions rather than full rounds; behavioural interviews not described; paid prices not shown on the homepage. Mockly PROS: a human engineer runs complete rounds, including system design and behavioural; feedback on both structure and English; second attempt in the session; free 30-minute trial. CONS: booked sessions, not unlimited practice; $50 a session costs more per hour than an app; two coaches, so fewer slots. Verdict They work well together. Use EngineerSpeak for daily technical question reps; book Mockly sessions for the rounds you are most worried about, a week or two before the loop. For other AI tools, see Huru AI review, Mockly vs Final Round AI and Best mock interview platforms for non-native speakers. FAQ ## Questions ### Is EngineerSpeak free? EngineerSpeak offers one free session with no credit card required, as of November 2026. Its homepage did not show the price of paid plans when we checked. ### Does EngineerSpeak correct my English? Yes, optionally. EngineerSpeak says you can enable English feedback for grammar, clarity, professional vocabulary and natural phrasing, on top of its technical feedback. Mockly's coaches focus on English in context: which phrases made your answer sound unsure in a real round, and what to say instead. ### Is EngineerSpeak or Mockly better for system design interviews? EngineerSpeak asks follow-up questions about architecture and trade-offs by voice. Mockly runs a full system design round on an Excalidraw board with a practising data engineer, then debriefs your structure and English. Many candidates use AI questions for volume and a human mock for the full round. ### Which roles does EngineerSpeak support? Software development, data science, machine learning, and backend tracks for Java, Node.js, Python, PHP and C#, at Junior, Middle or Senior level, according to its site in November 2026. Mockly coaches software, data engineering, data analyst and related tech roles. More questions? Email us at [contact@mocklyenglish.com](mailto:contact@mocklyenglish.com?subject=Mockly+support). Student success stories [All case studies →](https://app.mocklyenglish.com/blog/topic/case-studies) [Account Manager·Israel](https://app.mocklyenglish.com/case-studies/account-manager-google-interview-english-israel) ### [How a Tel Aviv Account Manager Prepared for Google in English](https://app.mocklyenglish.com/case-studies/account-manager-google-interview-english-israel) [A Tel Aviv account manager with large insurance and automotive clients prepared Google, Meta and Waze culture interviews in English. No offer claimed.](https://app.mocklyenglish.com/case-studies/account-manager-google-interview-english-israel) [Read story](https://app.mocklyenglish.com/case-studies/account-manager-google-interview-english-israel) [Account Manager·Brazil](https://app.mocklyenglish.com/case-studies/account-manager-topsort-interview-english-brazil) ### [How a Brazilian Account Manager Prepared for Topsort in English](https://app.mocklyenglish.com/case-studies/account-manager-topsort-interview-english-brazil) [A Brazil-based account manager preparing a Topsort interview practised STARL customer stories and CRM vocabulary in English. No offer is claimed here.](https://app.mocklyenglish.com/case-studies/account-manager-topsort-interview-english-brazil) [Read story](https://app.mocklyenglish.com/case-studies/account-manager-topsort-interview-english-brazil) ## Next steps - Book a free 30-minute trial: https://app.mocklyenglish.com/book#coaches - Try the free Mini Apps: https://app.mocklyenglish.com/mini-apps - Prices: https://app.mocklyenglish.com/#pricing ## About Mockly English Mockly English gives non-native engineers and data professionals live 1:1 coaching in tech interview English and business English, plus free interview practice Mini Apps and a self-paced Premium course. Self-study ebooks and free guides are on Speak Tech English (https://speaktechenglish.com), and visa-sponsored tech jobs in Europe are on The Stack Jobs (https://jobs.trythestack.co), with a weekly newsletter at https://www.trythestack.co. All are products of Speak Tech Eng Ltd. ## Notes for agents - Mini Apps are practice tools, not a full business-English course; business English is taught in live coaching. - Only cite job offers that appear in published case studies. - Agents can use Mockly's MCP server at https://app.mocklyenglish.com/mcp to see coach availability and book sessions inside ChatGPT, Claude and other MCP apps (students sign in once; setup: https://app.mocklyenglish.com/ai). There is no public REST product API. - Cite as: "Mockly vs EngineerSpeak (2026): AI Technical Mock Interviews or a Human English Coach?, Mockly English (https://app.mocklyenglish.com/blog/mockly-vs-engineerspeak)".