# Appen vs Select Star

Appen records 665,840 monthly visits with +0.2% month-over-month growth and Contact for Pricing pricing. Select Star records 0 monthly visits with — growth and Contact for Pricing pricing.

| Metric | [Appen](https://openaitools.app/tool/appen-com) | [Select Star](https://openaitools.app/tool/select-star) |
| :--- | :--- | :--- |
| Website URL | https://appen.com | https://chromewebstore.google.com/detail/select-star/okjjmjmiaemccchgkpchjpkaomabndek |
| Categories | AI Models, Large Language Models (LLMs), AI Developer Tools | Other |
| Pricing Model | Contact for Pricing | Contact for Pricing |
| Monthly Visits | 665,840 | 0 |
| MoM Growth Rate | +0.2% | — |
| Primary Market | United States | Global |
| Direct Visits | 238,314 | 0 |
| Review Score | 4.4 | 4.4 |
| Saved Count | 2 | 1 |
| Supported Platforms | Website | Browser Extension |

## Appen

Appen is one of the oldest pure-play AI data companies, tracing its roots to 1996 when it began building human-labeled datasets for speech recognition and NLP. Over three decades it supported successive generations of model development — search relevance in the 2000s, machine translation, deep-learning vision annotation, Transformer-era semantics, GPT-3 scale corpora, RLHF for conversational AI, and now agentic and multimodal foundation models.

Today Appen positions itself around six specialised capability areas: Frontier Alignment (chain-of-thought reasoning traces, SME RLHF, supervised fine-tuning demonstrations, adversarial red teaming), Agentic AI (golden trajectories, RL environment design, failure-mode taxonomies, SWE-driven evaluation), Multimodal and Speech AI (multilingual ASR and conversational corpora, expressive TTS annotation, VLM training data, video action labelling), Physical AI (LiDAR point-cloud annotation, multi-camera sensor fusion, robotics demonstration trajectories, world-model rollouts), Model Integrity (hallucination benchmarking, bias detection, regulatory audits and continuous monitoring), and Research Services (context engineering, calibrated LLM-as-a-judge, synthetic data and custom benchmarking).

Delivery runs through Appen's AI Data Platform (ADAP), which blends automation with human oversight, and the company cites SOC 2 and ISO 27001 certification, 500+ global locales, and a client roster that includes major cloud, search, retail and aerospace organisations. Appen does not publish self-serve pricing; engagements start with a scoping conversation and are quoted per project, so cost depends on data volume, language coverage, modality and annotation complexity.

**Pricing & Plans:** Enterprise/contact-for-pricing. Appen does not publish self-serve plans; projects are scoped and quoted individually. Appen also sells off-the-shelf (OTS) datasets and crowd/contractor workforce programs with separate terms.

- **Frontier alignment data:** Chain-of-thought reasoning traces, SME-level RLHF, supervised fine-tuning demonstrations and adversarial red teaming for the most capable models.
- **Agentic AI datasets:** Golden trajectories, RL environment design, failure-mode taxonomies and software-engineering-driven deep evaluation for autonomous agents.
- **Multimodal and speech corpora:** Multilingual ASR and conversational speech data, expressive TTS annotation, vision-language model training data, video action labelling and voice-agent evaluation.
- **Physical AI annotation:** LiDAR point-cloud labeling, multi-camera sensor fusion, robot demonstration trajectories, world-model rollouts and embodied interaction logs.
- **Model integrity and evaluation:** Hallucination benchmarking, bias detection, regulatory audits and continuous monitoring, plus independent model evaluation.
- **AI Data Platform (ADAP):** A production platform that combines automation with human oversight, with SOC 2 and ISO 27001 certification and 500+ locales covered.

**Strengths:** Three decades of annotation methodology, tooling and workforce management experience; Very broad coverage: frontier alignment, agentic, speech, multimodal, physical AI and evaluation in one vendor; 500+ locales and multilingual expertise that most in-house teams cannot match; Enterprise-grade security posture (SOC 2, ISO 27001) and publicly listed governance

**Limitations:** No transparent self-serve pricing; every engagement requires a sales/scoping cycle; Enterprise-oriented contracts can be heavy for small teams or indie developers; Quality depends on workforce management, so results vary by project and locale; Overlaps with many cheaper specialist annotation vendors, making vendor selection non-trivial

[Profile (Markdown)](https://openaitools.app/tool/appen-com.md)

## Select Star

Select Star attacks a problem every maturing data team recognizes: the data exists, but nobody is sure which version of it is authoritative or who to ask. The platform connects to your warehouses, ELT/ETL pipelines, and BI tools, reads their metadata and query history, and automatically produces documentation, lineage, and usage statistics. Instead of a manually maintained spreadsheet of tables, you get a living catalog that reflects what is actually being queried, including which tables have quietly gone unused.

Lineage is the centerpiece. Select Star traces data down to the column level and across platforms, so you can answer concrete questions: if this field changes, which dashboards break, and who gets affected? The same graph is used for governance — PII tags can be propagated to downstream columns so sensitive data is visible wherever it flows, which matters for audits and compliance work. A data portal layer sits on top, letting anyone search for certified datasets, read descriptions and tags, and record discussions against a dataset so answers stay attached to the data.

More recently Select Star has leaned into AI readiness. Reporting is that it is now part of Snowflake, and the product exposes metadata, lineage, and generated semantic models to LLMs and agents through interfaces such as an MCP server, aiming to be the context layer that makes AI answers trustworthy rather than plausible. Pricing is quote-based rather than published, and is typically sized against the number of connected sources, data volume, and required seats, so evaluation starts with a sales conversation.

**Pricing & Plans:** Quote-based enterprise pricing; Select Star does not publish public list prices. Cost depends on the scale of your environment — connected data sources, data volume, and the seats or capabilities you need — so evaluation typically starts with contacting sales. There is a free Chrome extension, and the SEO/AI discovery scoop of legacy listings should not be read as a price.

- **Automated data catalog and documentation:** Select Star automatically indexes metadata across warehouses, pipelines, and BI tools, generating documentation so analysts spend less time hunting for the right dataset.
- **Column-level lineage and impact analysis:** Cross-platform, column-level lineage shows where data originates, who is using it, and which dashboards are built on top of it, so impact is visible before you change anything.
- **Data portal for shared knowledge:** A shared data portal where teams tag and describe assets, ask questions, and browse previous discussions attached to each dataset, turning tribal knowledge into searchable documentation.
- **Governance, PII tracking, and security:** Use lineage and tagging to locate exactly where sensitive fields travel, propagate PII tags downstream, and support SOC 2-aligned security, confidentiality, and availability practices.
- **AI-ready metadata for LLMs and agents:** Reverse-engineered semantic models and an MCP server expose metadata, lineage, and semantics to LLMs and agents, giving AI tools the context they need for reliable answers.

**Strengths:** Automated cataloging removes the manual work of maintaining a data inventory; Column-level, cross-platform lineage makes change impact analysis concrete; PII tag propagation and SOC 2-aligned controls support governance and audits; A shared portal turns scattered tribal knowledge into searchable documentation

**Limitations:** Enterprise-focused pricing means no transparent public price list and a longer procurement cycle; Value depends heavily on how many data sources and BI tools you connect; a small stack gains less; Heavier governance and tagging features can require ongoing admin effort to keep metadata useful; Being acquired by Snowflake may raise questions about roadmap focus for non-Snowflake-centric stacks

[Profile (Markdown)](https://openaitools.app/tool/select-star.md)

## Frequently Asked Questions

### How do Appen and Select Star compare in monthly traffic?

Appen has 665,840 monthly visits, while Select Star has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Appen has a month-over-month growth rate of +0.2%; Select Star has —.

### How does pricing compare?

Appen: Contact for Pricing. Enterprise/contact-for-pricing. Appen does not publish self-serve plans; projects are scoped and quoted individually. Appen also sells off-the-shelf (OTS) datasets and crowd/contractor workforce programs with separate terms. Select Star: Contact for Pricing. Quote-based enterprise pricing; Select Star does not publish public list prices. Cost depends on the scale of your environment — connected data sources, data volume, and the seats or capabilities you need — so evaluation typically starts with contacting sales. There is a free Chrome extension, and the SEO/AI discovery scoop of legacy listings should not be read as a price.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Duck.ai](https://openaitools.app/tool/duck-ai) | 26,431,539 | +10.7% | Free | Private AI chat from the makers of DuckDuckGo | [.md](https://openaitools.app/tool/duck-ai.md) |
| 2 | [Prolific](https://openaitools.app/tool/prolific-com) | 18,697,671 | -1.8% | Paid | Connects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines. | [.md](https://openaitools.app/tool/prolific-com.md) |
| 3 | [Invisible Technologies](https://openaitools.app/tool/invisible-technologies-inc) | 1,364,520 | +64.4% | Contact for Pricing | Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service. | [.md](https://openaitools.app/tool/invisible-technologies-inc.md) |
| 4 | [Labelbox](https://openaitools.app/tool/labelbox) | 762,803 | -22.8% | Contact for Pricing | Combines robust data labeling tools with automated workflows, but focuses more on software tooling than managed human workforces. | [.md](https://openaitools.app/tool/labelbox.md) |
| 5 | [Scale](https://openaitools.app/tool/scale) | 616,915 | +12.5% | Contact for Pricing | Provides enterprise-grade AI training data and model evaluation at massive scale, but often with higher enterprise pricing. | [.md](https://openaitools.app/tool/scale.md) |
| 6 | [SuperAnnotate](https://openaitools.app/tool/super-annotate) | 386,034 | +37.4% | Free Trial, Contact for Pricing | Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks. | [.md](https://openaitools.app/tool/super-annotate.md) |
| 7 | [Arize AI](https://openaitools.app/tool/arize-com) | 249,028 | +3.2% | Paid, Contact for Pricing | Agent observability, evaluation, and continuous improvement for production AI | [.md](https://openaitools.app/tool/arize-com.md) |
| 8 | [Encord](https://openaitools.app/tool/encord-com) | 244,204 | +9.4% | Contact for Pricing | The multimodal data layer for computer vision and physical AI teams | [.md](https://openaitools.app/tool/encord-com.md) |
| 9 | [Dex — Personal CRM & LinkedIn Assistant](https://openaitools.app/tool/linkedin-gpt-assistant-by-dex) | 156,354 | +1.6% | Paid | The personal CRM that keeps your network warm — with your LinkedIn graph baked in | [.md](https://openaitools.app/tool/linkedin-gpt-assistant-by-dex.md) |
| 10 | [Defined.ai](https://openaitools.app/tool/definedcrowd-com) | 146,251 | -21% | Contact for Pricing | Enterprise AI training data, annotation and evaluation services | [.md](https://openaitools.app/tool/definedcrowd-com.md) |

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Source: https://openaitools.app/compare/appen-com-vs-select-star

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