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Heap VS xmlvalid

Compare Heap VS xmlvalid and see what are their differences

Heap

Analytics for web and iOS. Heap automatically captures every user action in your app and lets you measure it all. Clicks, taps, swipes, form submissions, page views, and more.

Rating
0 reviews
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Alternatives Is it good?
xmlvalid

Validate XML and e-invoices up to 1 GB in your browser: XSD, DTD, RelaxNG and official business rules

Rating
0 reviews
Pricing
Freemium $29 / Monthly (Pro)
Promote on VibeVoted
Alternatives Is it good?
Nova Net Worth
Net worth tracker for people who own assets through LLCs, trusts or rentals sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Heap seems to be more popular. It has been mentioned 11 times since March 2021.

social mentions
11 vs 0
Analytics popularity
100% vs 0%
alternatives listed
240+ vs 9

Base details

Website, pricing, platforms and company facts side by side.

Heap
xmlvalid
Website heap.io xmlvalid.com
Pricing
Official pricing
Freemium $29 / Monthly (Pro) Official pricing
Platforms —
Web REST API gRPC APISOAP API
Company Startup from the United States · 100 - 249 employees · 2013 Startup from Ukraine · 1 - 9 employees · 2026
Listed in
User Analytics Analytics Web Analytics Mobile Analytics +1
Developer Tools APIs CI/CD XML Data Validation Finance +3

About Heap and xmlvalid

In their own words, as submitted to SaaSHub.

Heap
xmlvalid

No description of Heap yet.

xmlvalid is an online XML validator built for production-size documents and e-invoicing. Validation XSD 1.0, DTD, RelaxNG (XML and compact syntax) 7,700+ Schematron business rules: EN 16931 (UBL and CII), Peppol BIS and PINT, XRechnung, ZUGFeRD / Factur-X, and national rules from France, Italy,...

Read more about xmlvalid

Features and specs

What each product offers, as listed by its team.

Heap 5 features
xmlvalid 19 features
  • Automatic Event Tracking
    Heap captures all user interactions automatically without requiring manual event setup, making it easier to get started and ensuring comprehensive data collection.
  • User-friendly Interface
    Heap provides a clean and intuitive interface, which allows non-technical users to easily create and analyze custom reports and dashboards.
  • Retroactive Analysis
    With Heap, users can define events at any time and view historical data, enabling analysis of past behaviors without prior configuration.
  • Comprehensive Data
    Heap collects a wide array of data points including clicks, form submissions, page views, and more, offering a holistic view of user interactions.
  • Integrations
    Heap offers robust integration capabilities with other analytics platforms, CRM systems, and data warehouses, facilitating seamless data flow between tools.

Possible disadvantages

  • Cost
    Heap can be expensive for smaller businesses or startups, particularly as the volume of tracked events and the number of users increases.
  • Learning Curve
    Despite its user-friendly interface, some users report a steep learning curve when it comes to leveraging Heap's more advanced features and capabilities.
  • Limited Customization
    While Heap provides a lot of data out-of-the-box, some users may find the customization options for tracking and reporting somewhat limited compared to other tools that offer more flexibility.
  • Data Redundancy
    The automatic tracking feature, while comprehensive, can sometimes lead to data redundancy or capturing irrelevant events, which may require additional data cleaning.
  • Reporting Complexity
    Some users have expressed that creating complex reports and funnels can be challenging and may require a deeper understanding of the platform's capabilities.
  • Schema languages
    XSD 1.0, DTD, RelaxNG (XML and compact)
  • Business rules
    7,700+ Schematron rules (EN 16931, Peppol BIS and PINT, XRechnung, Factur-X, national CIUS) plus your own .sch
  • Schema catalog
    177 official schemas with all their include files
  • Country guides
    E-invoicing in 24 countries, the profile picked from the invoice automatically
  • Max File Size
    50 MB without an account, 1 GB with a free account (5 GB tested)
  • Batch validation
    A folder or .zip of up to 1,000 documents
  • Privacy
    Validated in the browser, nothing uploaded
  • Input methods
    Upload, paste, URL, or a folder or .zip of up to 1,000 documents
  • PDF invoices
    Factur-X, ZUGFeRD and ISDOC, with PDF/A (veraPDF) and PDF text checks
  • Error details
    Line and column, explanations for libxml2, Java (Xerces) and .NET messages
  • E-invoice Detection
    Profile picked automatically from the document
  • API
    REST (OpenAPI 3.1), SOAP, MCP server, SDKs for PHP, Laravel, Symfony, Python and JavaScript
  • CLI
    CLI (npm @xmlvalid/cli), GitHub Action, GitLab CI, pre-commit
  • URL monitors
    Alerts by email or webhook when a feed starts failing
  • Reports
    PDF, HTML, JSON export, share links
  • Dark Mode
  • Integrations
    n8n, Apify, Postman
  • Monitoring
    URL monitors with email and webhook alerts
  • Free Tools
    XML formatter, XPath tester, XSLT transformer, XML diff, XML to JSON / CSV, XSD generator, XSD to XML, e-invoice viewer

Analysis

An editorial look at what each product does well and who it suits.

Heap
xmlvalid

Overall verdict

  • Heap is a robust analytics solution that is well-suited for businesses looking for an easy-to-implement tool that delivers detailed insights without requiring significant technical expertise. While it might be overkill for very small businesses or startups with minimal data analysis needs, its capabilities stand out for medium to large enterprises that want a more profound understanding of user interactions.

Why this product is good

  • Heap is generally considered a good analytics tool because it offers comprehensive and automatic data capturing, which helps businesses understand user behavior without needing extensive tracking plans. Users appreciate its ease of use, modern interface, and powerful analysis capabilities that allow non-technical users to generate insights quickly. Heap provides features like retroactive analytics and detailed funnel analysis, which can be incredibly valuable for improving user experience and increasing conversion rates.

Recommended for

    Heap is recommended for medium to large companies, product managers, marketing teams, and data analysts who need a platform that offers detailed, user-level insights and robust analytics features without the complexity of setting up extensive tracking code. It is also well-suited for teams that want to make data-driven decisions quickly and efficiently.

No analysis of xmlvalid yet.

Videos

Walkthroughs and reviews on video.

Heap 3 videos + Add
xmlvalid 0 videos + Add

Septimus Heap Series by Angie Sage || Spoiler Review

More videos

  • - Fargo Season 1 Episode 8 "The Heap" Review
  • - Data Structures: Heaps

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

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Heap
xmlvalid
100% 100%
Analytics
0% 0%
0% 0%
Data Validation
100% 100%
100% 100%
Web Analytics
0% 0%
0% 0%
Finance
100% 100%

Questions & Answers

As answered by people managing Heap and xmlvalid.

Which are the primary technologies used for building your product?

xmlvalid's answer:

  • Rust and libxml2 (validation engine), compiled to WebAssembly
  • SaxonJS (Schematron business rules)
  • veraPDF (PDF/A checks)
  • Laravel and Livewire (PHP)
  • Tailwind CSS
  • PostgreSQL, Redis, Meilisearch
  • Cloudflare

What makes your product unique?

xmlvalid's answer:

  • Schema validation and e-invoicing business rules in one place: XSD, DTD and RelaxNG, plus 7,700+ Schematron rules of EN 16931, Peppol BIS and PINT, XRechnung, Factur-X and national formats from France and Italy to Saudi Arabia, Mexico and Brazil
  • Built for large files: a streaming Rust engine (libxml2 compiled to WebAssembly) validates documents up to 1 GB in the browser with flat memory (5 GB tested)
  • 177 official schemas ready to use, and e-invoice profiles detected automatically from the document
  • E-invoice PDFs (Factur-X, ZUGFeRD, ISDOC) checked whole: the XML inside, PDF/A, and the PDF's text against the XML
  • Every error links to a page explaining why it fails and how to fix it, for libxml2, Java and .NET messages
  • The same checks in CI and integrations: REST API, SOAP, MCP server for AI agents, CLI, GitHub Action, n8n

Why should a person choose your product over its competitors?

xmlvalid's answer:

  • Desktop editors (XMLSpy, Oxygen) are powerful but expensive and need installing; xmlvalid works in the browser for free
  • Simple online validators check one schema and stop at a few MB; xmlvalid streams up to 1 GB and ships schemas with all their imports
  • E-invoice validators (KoSIT, Peppol testbeds) check one format each and have no CI tooling; xmlvalid covers many formats and countries, reads PDF invoices, and has an API, CLI and GitHub Action
  • Documents are validated in the browser and not uploaded

How would you describe the primary audience of your product?

xmlvalid's answer:

  • Developers and integrators building or receiving e-invoices (Peppol, XRechnung, Factur-X, FatturaPA, KSeF, ZATCA, CFDI, NF-e, UBL, CII)
  • ERP and accounting software vendors preparing for national e-invoicing mandates
  • Teams that exchange XML with partners: payments (ISO 20022), healthcare (HL7 CDA, FHIR), feeds and sitemaps
  • DevOps engineers who want XML checks in CI pipelines
  • Anyone who needs to validate a large XML file quickly without installing software

What's the story behind your product?

xmlvalid's answer:

xmlvalid is built and run by Oleksii Babintsev, a developer from Ukraine, so questions and bug reports reach the person who builds the engine. It started as a streaming validator for XML files too large for typical online tools, and grew into e-invoicing as countries made structured invoices mandatory: business rules for EN 16931, Peppol, XRechnung and national formats in 24 countries, PDF invoices, an API, CLI and GitHub Action for CI, and monitors for XML feeds. While building it, we found and fixed a slowdown in libxml2's validation of large files and contributed the fix upstream. It launched in October 2026

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Heap no reviews yet
xmlvalid no reviews yet

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We have no reviews of xmlvalid yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Heap 11 mentions
xmlvalid 0 mentions
  • free-for.dev
    Heap.io — Automatically captures every user action in iOS or web apps. Free for up to 5,000 visits/month. - Source: dev.to / almost 4 years ago
  • Question about testID in prod vs dev builds
    Check out Heap for React Native - https://heap.io. Source: about 4 years ago
  • All 2200+ companies in my db have a dedicated page now.
    How heavily does the site depend on heap.io for its core functionality? Like, say Heap went under completely out of the blue (god forbid) and you had to switch to Google analytics, how much tech debt are you in? Source: over 4 years ago

View more

Tracking xmlvalid since Oct 2026.

Alternatives to Heap and xmlvalid

When comparing Heap and xmlvalid, you can also consider the following products.

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