Software Alternatives, Accelerators & Startups

Speechius VS LangSmith

Compare Speechius VS LangSmith and see what are their differences

Speechius logo Speechius

The teleprompter that listens - your script follows the words you say

LangSmith logo LangSmith

Build and deploy LLM applications with confidence
  • Speechius Your script scrolls when you speak
    Your script scrolls when you speak //
    2026-07-30
  • Speechius Always see where you are in the script
    Always see where you are in the script //
    2026-07-30
  • Speechius Fits any window and stays on top
    Fits any window and stays on top //
    2026-07-30
  • Speechius Skip words and trigger slides
    Skip words and trigger slides //
    2026-07-30
  • Speechius On-device, one-time purchase, macOS and Windows
    On-device, one-time purchase, macOS and Windows //
    2026-07-30

Speechius is a desktop teleprompter that scrolls when you speak. Speech recognition runs entirely on device and matches what you actually said against your script, so the text moves at your pace instead of a fixed speed. Pause and it waits. Go off-script and it catches up on its own.

It is not a dictation tool: nothing is transcribed into a document. Your script stays your script, and the app only decides how far you have got.

What it does

  • Follows your voice word by word along a focus line you place yourself
  • Floats above any application, so it works with Zoom, Meet, Teams and OBS rather than inside one recorder
  • Can be excluded from screen sharing and screen recording, so your audience sees only your slides
  • Resize the window freely; the focus line stays where you put it
  • Adjustable transparency, so you keep an eye on what is behind the script
  • Mark words to skip, for names the recognizer never gets right
  • Mark trigger words that advance your slides automatically
  • Pin the window so it always stays on top

Who it is for

People who record screencasts and tutorials, run webinars and online classes, or rehearse conference talks, and who want to sound spoken rather than read.

Practical details

macOS 13 or newer and Windows 10/11. Recognition in English and German. One-time purchase, no subscription, with a 14-day trial that starts with your first recognition session.

  • LangSmith Landing page
    Landing page //
    2023-10-21

Speechius

$ Details
paid Free Trial โ‚ฌ30 / One-off (Pro)
Platforms
MacOS Windows
Release Date
2026 July
Startup details
Country
Germany
City
Tubingen
Founder(s)
Jay Imdahl
Employees
1 - 9

LangSmith

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

Speechius features and specs

  • Voice-following scroll
    The script moves only when you actually say the next words. Pause and it waits.
  • On-device speech recognition
    Apple Speech on macOS, a bundled Vosk model on Windows. Nothing leaves your machine.
  • Recognition languages
    English and German
  • Hidden on screen share
    The window can be excluded from screen sharing and screen recording.
  • Anchor line
    Drag the focus line to where you read; the text balances around it.
  • Window transparency
    Adjustable, so you keep an eye on what is behind the script.
  • Always on top
    Pin the window above any application, including Zoom, Meet, Teams and OBS.
  • Skip words
    Mark names the recognizer never gets right so they are ignored.
  • Slide triggers
    Mark words in your script that advance your slides automatically.
  • Licence
    One-time purchase, no subscription, 14-day trial.

LangSmith features and specs

  • Enhanced Workflow Integration
    LangSmith provides seamless integration with existing workflows, allowing for a streamlined process when incorporating language models into various applications.
  • User-Friendly Interface
    The platform features an intuitive and user-friendly interface, making it accessible for both technical and non-technical users to navigate and utilize effectively.
  • Advanced Language Model Support
    LangSmith offers support for a wide range of advanced language models, enabling users to choose the best fit for their specific needs.
  • Comprehensive Analytics
    Users have access to comprehensive analytics tools that allow for detailed monitoring and evaluation of language model performance.

Possible disadvantages of LangSmith

  • Cost Considerations
    Depending on the scale and frequency of use, LangSmith can become costly, potentially making it less accessible for smaller organizations or individual developers.
  • Learning Curve
    While user-friendly, mastering all features of LangSmith may require some time and effort, especially for users who are less experienced with language models.
  • Limited Customization
    Some users might find the customization options for certain aspects of the platform to be limited compared to building a solution in-house.
  • Dependency on Internet Connectivity
    LangSmith, being a cloud-based service, relies heavily on a stable internet connection, which can be a limitation in regions with poor connectivity.

Analysis of LangSmith

Overall verdict

  • LangSmith is a valuable tool for developers working in the field of natural language processing or any project involving language models. Its comprehensive toolset for managing and optimizing interactions with LLMs provides a significant advantage, enhancing both productivity and the quality of applications built with it.

Why this product is good

  • LangSmith, the platform from LangChain, offers a suite of tools and features that facilitate building applications powered by language models. It provides capabilities like prompt management, evaluation, and debugging, which are essential for developers working with LLMs. These features make it easier to manage, refine, and optimize the performance of language model applications.

Recommended for

    LangSmith is recommended for AI developers, machine learning engineers, and businesses aiming to build, test, and optimize applications based on language models. It is particularly useful for teams that require robust evaluation tools and a streamlined process for managing and deploying language-driven applications.

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LangSmith videos

๐Ÿฆœ๐Ÿ› ๏ธ Getting started with LangSmith - Integrating with LANGCHAIN powered Web Applications & Chatbots

Category Popularity

0-100% (relative to Speechius and LangSmith)
Productivity
100 100%
0% 0
AI
0 0%
100% 100
Screen Recording
100 100%
0% 0
Developer Tools
0 0%
100% 100

Questions & Answers

As answered by people managing Speechius and LangSmith.

What makes your product unique?

Speechius's answer

It recognises the words you actually say and finds them in your script, rather than scrolling on a timer or reacting to how loudly and quickly you speak. That means it still follows you when you rephrase a sentence, skip a line or jump back.

Recognition runs entirely on your own device, and the window can be excluded from screen sharing and screen recording.

Why should a person choose your product over its competitors?

Speechius's answer

Several teleprompters advertise voice-controlled scrolling, but most of them track your speaking pace and volume: they speed up when you speak faster and stop when you go quiet. They do not know which words you said, so going off-script or jumping back confuses them.

Speechius matches the recognised words against your script, which is the part that keeps working when you stop reading and start talking. It is also a one-time purchase rather than a subscription, and nothing is sent to a server.

How would you describe the primary audience of your product?

Speechius's answer

People who speak to a camera or an audience while their script has to stay out of sight:

  • Creators recording screencasts and tutorials
  • Trainers and teachers running online classes and webinars
  • Speakers rehearsing conference talks

Typically solo, on their own machine, without a studio setup.

What's the story behind your product?

Speechius's answer

I record programming tutorials for my own YouTube channel, and neither option worked for me: reading from a script sounds read, and improvising means losing the thread until a ten-minute recording takes forty. Existing teleprompters scroll at a fixed pace, so I ended up chasing the text instead of explaining.

I built the thing I wanted, and it turned into my first own product, released in July 2026.

Which are the primary technologies used for building your product?

Speechius's answer

  • Flutter for the user interface on macOS and Windows
  • Apple Speech for on-device recognition and window exclusion on macOS
  • Vosk, bundled as a local model, for recognition on Windows
  • Ed25519 signatures for licence keys, sold through Paddle
  • Sparkle for updates on macOS, Sentry for crash reporting

User comments

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What are some alternatives?

When comparing Speechius and LangSmith, you can also consider the following products

FlowPrompter - A Fluid and Smooth Teleprompter APP

Langfuse - Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.

GhostPrompter - Read your script while recording or presenting. GhostPrompter is a laptop teleprompter app for Windows and Mac with click-through overlay. One-time $49.

Helicone AI - Open-source LLM Observability for Developers

TalkEze - Invisible speaker notes, visible confidence.

LangChain - Framework for building applications with LLMs through composability