Software Alternatives, Accelerators & Startups

Fluid VS Alterable

Compare Fluid VS Alterable and see what are their differences

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Fluid logo Fluid

Turn Your Favorite Web Apps into Real Mac Apps.

Alterable logo Alterable

Real-time, open-time content for email: countdown timers, dynamic images, live product picks, geo-targeted maps, one-click surveys, and scratch-card rewards. No code, no ESP integration, rendered fresh every time someone opens.
Visit Website
  • Fluid Landing page
    Landing page //
    2021-07-29
  • Alterable
    Image date //
    2026-08-29
  • Alterable
    Image date //
    2026-08-29
  • Alterable
    Image date //
    2026-08-29
  • Alterable
    Image date //
    2026-08-29
  • Alterable
    Image date //
    2026-08-29

Alterable adds real-time, open-time content to email campaigns, no coding, no ESP integration, no resends. Every asset is a single image URL that renders fresh the moment a subscriber opens the message, not the moment you hit send.

Countdown timers count down live in the inbox. Choose a fixed deadline for your whole list, an evergreen timer that starts when each subscriber opens, or a per-recipient deadline pulled from a merge tag. Ten visual styles, full color and font control.

Dynamic images show a different visual to every recipient based on location, device, language, weather, temperature, or time of day. A no-code rules builder stacks conditions and maps each combination to its own image variation.

Dynamic products pull live price, stock, and availability at the moment an email opens. Sold-out items hide automatically; low-stock items get a scarcity badge. Sync via CSV, REST API, or a Shopify/BigCommerce connection.

Local maps show each subscriber their nearest store, rendered around their location at open-time. Four map styles, custom markers, and deep links to native navigation apps.

Surveys put a one-click star, number, or emoji rating directly in the email body, no landing page, no login. Results populate a live dashboard as votes arrive.

Scratchers turn a discount into a game: a scratch-card reveal linking to a hosted prize page, with customizable cover art, reveal animations, and (on Pro) multiple weighted prizes.

Every asset works the same way: build it in Alterable's editor, copy one image tag, paste it into any ESP. Because it's just an image, it works in every major email client, no JavaScript or AMP required. Integrates with 50+ platforms including Klaviyo, Mailchimp, HubSpot, Brevo, ActiveCampaign, Constant Contact, GetResponse, AWeber, and Kit.

Also included: 22-language localization, timezone support, real-time analytics, CDN delivery, and REST API access. Free to start, no credit card required.

Fluid

Pricing URL
-
$ Details
-
Platforms
-

Alterable

$ Details
freemium
Platforms
Web
Startup details
Country
United States
State
Delaware
City
Claymont
Founder(s)
Matthieu Fauveau, Nicolas Ropiot
Employees
1 - 9

Fluid features and specs

  • Dedicated Browsers
    Fluid creates site-specific browsers that allow users to have dedicated apps for their favorite web pages. This can enhance focus and organization by keeping tasks separate from regular web browsing.
  • Custom User Experience
    Each Site Specific Browser (SSB) can have a custom icon and name, providing a more personalized and aesthetically pleasing user interface.
  • Resource Management
    Having dedicated apps for regularly used web services can minimize the use of browser tabs and extensions, potentially leading to better performance and resource management.
  • Independence from Web Browser
    Fluid apps are independent of the main web browser. This means that if your browser crashes or has issues, your Fluid apps remain unaffected.
  • Enhanced Productivity
    By converting web apps into standalone desktop applications, users can more easily compartmentalize their work, leading to enhanced productivity.

Possible disadvantages of Fluid

  • Limited to MacOS
    Fluid is available only for MacOS, which limits its usability to Mac users and excludes users on other operating systems like Windows or Linux.
  • Manual Updates
    Users need to manually update each Site Specific Browser (SSB) created through Fluid, as these do not automatically update like regular browser tabs.
  • Security Risks
    As Fluid apps are essentially wrappers for web pages, they are subject to the same security risks as any web browser. Users need to ensure they are visiting trusted sites.
  • Limited Functionality
    Unlike full-fledged desktop applications, Fluid apps might have limited native functionality. They rely heavily on the web app's own features and may lack advanced desktop integrations.
  • Cost for Full Features
    While Fluid is free to use, certain advanced features, such as pinning apps to the status bar, require a one-time purchase of Fluid's paid version.

Alterable features and specs

  • Countdown Timers
    Live, ticking countdown images embedded in email via a single <img> tag. Re-rendered fresh every time an email is opened.
  • Dynamic Images
    Serves a different image per recipient based on location, device, language, weather, temperature, time of day, or custom rules, rendered at open-time.
  • Dynamic Products
    Product blocks showing live price, stock level, and availability at the moment of open; auto-hides sold-out items, auto-badges low stock.
  • Local Maps
    Geo-targeted map showing each recipient's nearest store or point of interest, rendered at open-time from a CSV-imported location list.
  • Surveys
    One-click star, number, or emoji rating widgets embedded directly in email; no landing page or login required to respond.
  • Scratchers
    Scratch-card-style gamified prize reveal; Alterable hosts the resulting prize page.

Analysis of Fluid

Overall verdict

  • Fluid is a good option for macOS users who find themselves frequently switching between web applications and want a more streamlined process. It's especially useful for those who prefer to keep web app sessions isolated or those who enjoy customizing their workflows. However, consider that it is only available for macOS and may not support all features of more complex web applications.

Why this product is good

  • Fluid (fluidapp.com) allows users to create site-specific browsers, which can be useful for treating web applications as standalone apps on macOS. This can help with productivity by preventing web distractions and organizing workflows. Fluid is particularly beneficial if you frequently use web apps and want them to function like native applications with their own dock icons and separate sessions.

Recommended for

  • MacOS users looking to create desktop-like experiences for web applications.
  • Individuals seeking to minimize distractions from other open tabs in a standard browser.
  • Users who need isolated sessions for different web applications.
  • People who appreciate customizing their desktop workflow.

Fluid videos

Primochill Vue Fluid Review

More videos:

  • Review - FluidReview - Accept Online Applications and Submissions and Review
  • Review - Golden Matte Fluid Acrylic Review • An Alternative to Gouache?

Alterable videos

No Alterable videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Fluid and Alterable)
Development Tools
100 100%
0% 0
SaaS
0 0%
100% 100
Group Chat & Notifications
Email Marketing
0 0%
100% 100

Questions & Answers

As answered by people managing Fluid and Alterable.

What makes your product unique?

Alterable's answer:

Most tools in this space (NiftyImages, Sendtric, MotionMail, CountdownMail) do one thing well, usually just countdown timers. Alterable is a single platform for six distinct open-time content types, timers, dynamic images, live product data, geo-targeted maps, surveys, and scratch-card rewards, all rendered the same way: one image tag, no ESP integration, no JavaScript.

That "just an image" approach is also what makes it universal: it works in every major email client without exception, since there's nothing for Outlook or Gmail to selectively support or block.

The rules engine is shared across all six content types too. The same conditions (location, weather, device, time of day, stock level) that pick a dynamic image can pick a product, a map location, or a timer variant, so teams build a targeting logic once and reuse it everywhere instead of learning a separate tool per feature.

Why should a person choose your product over its competitors?

Alterable's answer:

Against single-purpose timer tools (Sendtric, CountdownMail, MotionMail, CountingDownTo): those platforms do one thing, a countdown widget. Alterable includes countdown timers plus dynamic images, live product data, geo-targeted maps, surveys, and scratch cards, on one account, with one shared rules engine. If a team outgrows "just a timer," there's no second tool to adopt.

Against broader personalization platforms (NiftyImages, Movable Ink): Alterable is free to start with no credit card, and every asset is a plain image tag rather than requiring a native ESP integration or account connection. That keeps setup to minutes and means it works identically across Klaviyo, Mailchimp, HubSpot, GetResponse, or any of 50+ platforms, with no per-ESP configuration to maintain.

Because it's "just an image": there's no JavaScript, no AMP, no interactive-email fallback logic to write or test. It renders the same way in Outlook as it does in Gmail, which is where more elaborate interactive approaches usually break first.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Fluid and Alterable

Fluid Reviews

10+ Best Prototyping Tools for UI/UX Designers in 2018
With a strong focus on simplicity and communication, Fluid UI great Prototyping tools. Having built-in high and low fidelity component libraries, live team collaboration, device previews and video presentations making it a top-notch solution for designers, product managers and founders alike.

Alterable Reviews

We have no reviews of Alterable yet.
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Social recommendations and mentions

Based on our record, Fluid seems to be more popular. It has been mentiond 19 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Fluid mentions (19)

  • ToDesktop – Web app to desktop app in minutes
    > Is ToDesktop For Me? > If you want to make a desktop app of a website for your personal use, ToDesktop is overkill. I just want to point out that a lot of us "pros" learn how to use tools like this by semi-personal use. Therefore, you might want to consider a free personal version that's crippled in a mildly annoying way: For example, no installer, don't sign the app, and have an easily-ignorable nag. (Therefore... - Source: Hacker News / about 3 years ago
  • in safari Sonoma, do profiles act like containers ? (firefox container)
    If you haven't used Fluid - https://fluidapp.com , I would recommend trying the free download. Source: about 3 years ago
  • Why is it so hard to change Chromium's UI?
    You can use Min, Fluid or any browser with full screen mode to have the same effect. Source: over 3 years ago
  • Safari Window Management
    Https://fluidapp.com/ might do it for you. Other applications like this also exist. Source: over 3 years ago
  • Web Push for Web Apps on iOS and iPadOS
    Does Fluid[1] work as a solution for you? I’m on an older OS with an older version but I love it for creating single-site apps. [1] https://fluidapp.com/. - Source: Hacker News / over 3 years ago
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Alterable mentions (0)

We have not tracked any mentions of Alterable yet. Tracking of Alterable recommendations started around Feb 2022.

What are some alternatives?

When comparing Fluid and Alterable, you can also consider the following products

WebCatalog - Run your favorite web apps natively

NiftyImages - NiftyImages is a tool to engage clients with personalized images and countdown timers for email.

Nativeifier - Turn any webpage into a native app

OpenAlternative - Discover Open Source Alternatives to Popular Software

Coherence X - Coherence X4 is a powerful tool that allows you to turn any website into a chromium-based, isolated, native application on your Mac.

Movable Ink - Agile Email Marketing