Defined.ai records 146,251 monthly visits with -21% month-over-month growth and Contact for Pricing pricing. Email Verifier records 0 monthly visits with 0% growth and Freemium pricing.
Enterprise AI training data, annotation and evaluation services
Verify any email address for deliverability in under a second
| Dimension / Metric | | |
|---|---|---|
| Official Domain | definedcrowd.com | emailverifier.ai |
| Pricing Model | Contact for Pricing | Freemium |
| Monthly Visits | 146.25K (146,251) | 0 (0) |
| MoM Traffic Delta | -38.82K (-21%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (20.6%) | 🌐 Global (—) |
| Direct Visits / mo | 84.42K | 0 |
| User Rating | 4.4 | 4.1 |
| Supported Platforms | Website | Website |
Enterprise AI training data, annotation and evaluation services
A large selection of ready-to-use, ethically sourced datasets across audio, image, video, text and multimodal formats, with advanced filtering and free samples.
Expert-verified labeling for text, audio, image and video using model-first, human-in-the-loop workflows for accuracy and fairness.
High-quality multilingual content for global AI systems, drawing on 500+ languages, dialects and locales.
Global, diverse data collection at scale for training, with privacy and security vetting on every dataset.
Verify any email address for deliverability in under a second
Connects to the receiving mail server to confirm the mailbox is active and accepting messages, instead of relying on cached results.
Syntax, MX records, SMTP, catch-all detection, disposable detection and role-address flagging combine into one verdict.
Every address is labelled Deliverable, Risky or Undeliverable with a per-check breakdown so you know why.
Upload and clean whole lists rather than checking addresses one at a time, available on paid plans.
Free / Open-sourceOpen-source model and dataset hub with one-click online demos
Free / Open-sourceOpen-source model and dataset hub with one-click online demos
SpecialistUnbiased photo feedback from real people, for dating, business and social profiles
SpecialistUnbiased photo feedback from real people, for dating, business and social profiles
Free / Open-sourceStreamlines computer vision dataset annotation and model deployment, but lacks the broad human crowd-sourcing services of Defined.ai.
Free / Open-sourceStreamlines computer vision dataset annotation and model deployment, but lacks the broad human crowd-sourcing services of Defined.ai.
SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets
SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets
Comprehensive enterprise data labeling platform with powerful automation agents, but carries significant pricing overhead for smaller teams.
Comprehensive enterprise data labeling platform with powerful automation agents, but carries significant pricing overhead for smaller teams.
Real-time email verification and email finding that never stores your data
Real-time email verification and email finding that never stores your data
SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistAgent observability, evaluation, and continuous improvement for production AI
Advanced multimodal data infrastructure for computer vision teams, though specialized primarily in video and image annotation.
Advanced multimodal data infrastructure for computer vision teams, though specialized primarily in video and image annotation.
Free / Open-sourceOpen-source data labeling and evaluation platform offering full self-hosting control, but requires manual setup and infrastructure maintenance.
Free / Open-sourceOpen-source data labeling and evaluation platform offering full self-hosting control, but requires manual setup and infrastructure maintenance.
SpecialistFree browser-based BPM detection for any track—private, fast, and batch-ready
SpecialistFree browser-based BPM detection for any track—private, fast, and batch-ready
Free email spam checker and deliverability test with AI insights
Free email spam checker and deliverability test with AI insights
Cold email infrastructure set up in minutes
Cold email infrastructure set up in minutes
