10 Melhores Ferramentas Gratuitas de Análise de Ações em 2026: Testadas e Comparadas

Os filtros de ações gratuitos são amplamente utilizados pelos investidores para filtrar grandes mercados e criar listas de observação práticas, mas nem todas as ferramentas "gratuitas" oferecem a mesma profundidade de dados ou velocidade. Neste guia, testámos e comparámos os melhores filtros de ações gratuitos de 2026 para identificar quais as plataformas que se destacam na utilização real, com foco nos limites de filtro, atrasos na atualização de dados e quais as ferramentas que melhor se adaptam a diferentes estilos de negociação e investimento.

Como escolher o melhor analisador de ações gratuito para si

Escolher as melhores ferramentas gratuitas de seleção de ações não se resume a encontrar a ferramenta com a lista mais extensa de funcionalidades. A melhor abordagem é encontrar uma ferramenta que satisfaça as suas necessidades de dados, foco de mercado e estilo de investimento.

• Verifique primeiro o atraso dos dados: as ferramentas de análise de mercado gratuitas utilizam frequentemente cotações com atraso, sendo, por isso, mais adequadas para gerar ideias do que para executar negociações em tempo real. O Finviz, por exemplo, utiliza dados do mercado americano com atraso na sua versão gratuita.
• Escolha a ferramenta adequada à sua estratégia: os day traders precisam de dados e sinais técnicos mais rápidos, os swing traders podem geralmente trabalhar com dados desatualizados, e os investidores de longo prazo devem priorizar a avaliação, os lucros, a rentabilidade e o histórico financeiro.
• Analise a cobertura de mercado: algumas ferramentas focam-se principalmente em ações americanas, enquanto outras oferecem uma cobertura global mais ampla ou uma cobertura internacional selecionada. Isto é importante se quiser filtrar ações fora da NASDAQ, NYSE e AMEX.
• Verifique as limitações: um filtro gratuito pode limitar as exportações, os ecrãs guardados, os filtros avançados, os feeds em tempo real, o histórico financeiro ou o número de relatórios que pode visualizar.
• Utilize mais do que uma ferramenta de seleção quando necessário: Muitos investidores utilizam o Finviz para obter ideias rápidas sobre ações americanas, o TradingView para fluxos de trabalho baseados em gráficos técnicos e ferramentas fundamentais como o Stock Analysis ou o WallStreetZen para pesquisas mais aprofundadas sobre as empresas.

Em suma, o melhor filtro de ações gratuito é aquele que se adapta ao seu fluxo de trabalho sem ocultar os dados, o mercado ou as limitações de recursos que são mais importantes para a sua estratégia.

1. TradingView Stock Screener

O TradingView Stock Screener é amplamente utilizado para analisar os mercados globais com filtros técnicos e fundamentais, mas a sua versão gratuita apresenta limitações claras em termos de velocidade de dados e casos de utilização de execução.

Principais características e limitações da versão gratuita

• Ampla cobertura de filtros: Inclui indicadores técnicos, fundamentos e métricas de avaliação para ações, ETFs e diversas classes de ativos.
• Acesso ao mercado global: Abrange milhares de instrumentos nas principais bolsas internacionais.
• Atraso nos dados: Os utilizadores da versão gratuita podem receber dados de preços com atraso ou referentes ao final do dia em algumas corretoras, a menos que os dados em tempo real da corretora estejam ativados separadamente.
• Restrição de recursos: os alertas avançados, as análises mais detalhadas e os feeds de dados melhorados estão restritos aos planos pagos.

Prós e contras

• Prós: Sistema de filtragem robusto, ferramentas de gráficos integradas e ampla cobertura do mercado.
• Contras: Dados em tempo real limitados no plano gratuito e funcionalidades avançadas importantes restritas aos subscritores.

Ideal para

Mais indicado para traders de curto prazo e investidores de longo prazo que utilizam a seleção de candidatos para a geração de ideias e análise técnica, em vez da execução de ordens em tempo real.

2.º Finviz

Finviz is one of the most widely used free stock screeners for U.S. equity markets, known for its fast interface and simple filtering system. Its strength is speed and simplicity, but its limitations become clear when you look at market coverage and data access.

Key Free Features and Limits

• Market coverage: Limited to U.S. listed stocks, including NASDAQ, NYSE, and AMEX. It does not support direct screening of most international markets.
• Data delay: Free version typically provides delayed quotes around 15 minutes, making it less suitable for real-time intraday decision-making.
• Filter system: Offers a large set of screening filters covering fundamentals, technical indicators, and valuation metrics.
• Export limitations: Advanced export features such as detailed data downloads, including CSV exports, are restricted to the paid Elite version.

Pros and Cons

• Pros: Very fast screening interface, strong visual usability, and widely recognized for efficient U.S. stock filtering.
• Cons: Limited to U.S. markets, delayed data in free version, and key export and advanced features locked behind paywall.

Best For

Finviz is best suited for U.S.-focused traders who need fast stock screening for idea generation and shortlisting, especially swing traders and active investors who do not rely on real-time data precision.

3. Yahoo Finance Stock Screener

Yahoo Finance Stock Screener is primarily designed for beginners who need a simple and accessible way to filter stocks, but it is not built for advanced trading strategies or real-time market analysis.

Key Free Features and Limits

• Beginner-friendly interface: Simple layout that allows users to quickly filter stocks based on common metrics such as price, market cap, and P/E ratio.
• Basic screening depth: Suitable for simple stock discovery, but less advanced than dedicated technical screening tools used in active trading workflows.
• No advanced intraday tools: Does not support detailed breakout scanning, relative volume alerts, or high-frequency technical signal filtering.
• Limited strategy flexibility: Compared with dedicated screeners like Finviz or TradingView, it offers fewer customization options for complex technical screening strategies.

Pros and Cons

• Pros: Very easy to use, strong brand trust, and fully integrated with Yahoo Finance news and fundamental data ecosystem.
• Cons: Limited technical screening depth, weaker active-trading capabilities, and not suitable for advanced intraday trading strategies.

Best For

Yahoo Finance Stock Screener is best for beginners and long-term investors who prioritize simplicity and fundamental stock discovery over advanced technical screening or real-time trading signals.

4. FastBull Stock Screener

FastBull Stock Screener stands out from typical U.S.-only free screeners by combining stock screening with an integrated research environment — charts, news, financial indicators, and technical analysis in one place, across both U.S. and Vietnamese markets.

Key Free Features and Limits

• U.S. and Vietnam screening: FastBull supports stock screening for U.S. and Vietnamese equities, making it useful for investors who want exposure beyond a purely U.S.-only workflow.
• Integrated research workflow: Investors can move from screening results to price charts, market news, financial indicators, and technical analysis without switching between multiple platforms.
• Emerging-market angle: FastBull is especially useful for users who want to monitor selected international and emerging market opportunities, rather than only scanning NASDAQ, NYSE, and AMEX stocks.
• Flexible idea generation: The screener is suitable for building watchlists, comparing stocks, and identifying potential opportunities across different market environments.

Pros and Cons

• Pros: Strong fit for cross-market stock discovery, useful U.S. and Vietnam coverage, integrated charts and market news, and a smoother research workflow than many basic free screeners.
• Cons: Current screener coverage is limited to two markets, which is narrower than global platforms like TradingView or Koyfin.

Best For

FastBull Stock Screener is best suited for investors who want a free, practical stock screening tool with U.S. and Vietnam coverage, especially those looking for international diversification ideas and a smoother research workflow beyond basic watchlists.

5. Zacks Stock Screener

Zacks Stock Screener is built around a proprietary ranking system that focuses on earnings-based performance signals rather than simple technical or price-based filters, making it more strategy-driven than most free screeners.

Key Free Features and Limits

• Zacks Rank integration: Uses a proprietary 1–5 ranking system that evaluates stocks based on earnings estimate revisions, a core factor in Zacks’ investment methodology.
• Style Score system: Combines Value, Growth, and Momentum scores to help investors filter stocks based on different investment strategies.
• Custom screener access: Free users can build and use a basic custom screener with standard filters across valuation, fundamentals, and performance metrics.
• Premium gating: More advanced tools such as pre-built premium screens, Focus List strategies, and deeper research features are restricted to paid plans.

Pros and Cons

• Pros: Strong earnings-focused ranking system, structured investment framework, and useful for systematic stock selection.
• Cons: Many advanced screening strategies are locked behind premium subscription, and the system is more oriented toward medium-term investing than intraday trading.

Best For

Zacks Stock Screener is best suited for fundamental investors who prioritize earnings momentum and structured ranking systems over technical chart-based screening, especially those following value, growth, or momentum strategies.

6. Stock Analysis Stock Screener

Stock Analysis Stock Screener is designed for users who want a clean, beginner-friendly interface for screening stocks, combining basic fundamental metrics with an easy-to-navigate layout. Its strength is simplicity, but deeper historical data access is limited in the free version.

Key Free Features and Limits

• Simple interface: Focuses on clarity and ease of use, making it suitable for beginners who are new to stock screening.
• Broad fundamental metrics: Includes standard metrics such as valuation ratios, profitability indicators, financial health data, and other screening indicators for stock selection.
• Limited historical depth: Extended financial history and deeper long-term datasets may be less suitable for institutional-style research compared with premium platforms.
• Lightweight workflow: Optimized for quick screening and idea generation rather than deep institutional-style analysis.

Pros and Cons

• Pros: Very clean UI, easy learning curve, and suitable for quick stock discovery without complexity.
• Cons: Limited advanced screening depth compared with professional terminals, less strategy automation, and less suitable for complex multi-factor workflows.

Best For

Stock Analysis Stock Screener is best suited for beginner and lightweight investors who want to quickly explore stocks and transition gradually into deeper fundamental analysis before upgrading to more advanced tools.

7. Koyfin

Koyfin is a more advanced stock screening and analytics platform designed for investors who need deeper market visibility than typical free beginner screeners. It combines global screening, charting, and financial data tools, but its free tier is intentionally limited for professional-scale use cases.

Key Free Features and Limits

• Global stock screener: Provides access to international equities screening across multiple regions, making it more global than most U.S.-focused free tools.
• Watchlists and tracking tools: Users can build watchlists to monitor stocks and macro themes in a structured way.
• Advanced charting: Includes institutional-style charts and financial visualization tools that go beyond basic screener interfaces.
• Workflow limitations: Free users may face restrictions on advanced workflows, saved templates, exports, or deeper platform usage depending on the current plan structure.
• Financial history limits: Access to deeper financial history and professional-scale datasets may require paid plans, which reduces deep fundamental analysis capability for free-only users.

Pros and Cons

• Pros: Strong global coverage, professional-grade interface, useful watchlist system, and more advanced analytics compared to beginner-focused screeners.
• Cons: Some advanced features are limited in free plan, deeper financial history may require paid access, and it has a steeper learning curve compared to simple tools like Yahoo Finance or Stock Analysis.

Best For

Koyfin is best suited for intermediate to advanced investors who want a more institutional-style workflow, especially those who analyze multiple markets and require more structured financial data than beginner screeners provide.

8. Simply Wall St

Simply Wall St is a visually driven stock analysis platform designed to simplify fundamental investing by turning financial data into intuitive graphics, making it easier for investors to evaluate companies without relying on traditional tables and ratios.

Key Free Features and Limits

• Snowflake visualization: Core feature that summarizes a stock’s valuation, financial health, growth, and dividends in a single visual dashboard.
• Simplified company reports: Provides easy-to-read breakdowns of fundamentals, suitable for non-technical investors.
• Limited report access: Free users may face limits on how many full company reports or deeper analysis features they can access, depending on the current plan structure.
• Restricted screener access: Full screening capabilities are limited in the free plan compared to paid tiers, especially for building custom multi-factor screens.

Pros and Cons

• Pros: Extremely user-friendly interface, strong visual storytelling via Snowflake model, and ideal for quick fundamental understanding without financial jargon.
• Cons: Limited free access, reduced screening flexibility in free version, and less suitable for advanced or quantitative investors.

Best For

Simply Wall St is best suited for visual-oriented long-term investors who prefer simplified, graphics-based analysis over traditional financial tables, especially those who want quick company evaluation without deep technical screening.

9. MarketWatch Stock Screener

MarketWatch Stock Screener is designed as a lightweight entry-level tool that prioritizes simplicity and news integration over advanced screening depth, making it more of a discovery and research gateway than a professional screening platform.

Key Free Features and Limits

• Minimal filter set: Offers a small number of core screening inputs, including price, volume, market cap, P/E ratio, and technical filters.
• Beginner-oriented design: Simplified structure intended for users who are new to stock markets and need basic filtering without complex setup.
• Strong news integration: Screening results are tightly connected to MarketWatch news articles, analyst commentary, and related market context for each stock.
• Limited screening depth: Lacks advanced technical filters such as breakout signals, relative volume analysis, or multi-factor screening logic.

Pros and Cons

• Pros: Extremely easy to use, strong integration with financial news and analysis content, and useful for initial stock discovery.
• Cons: Very limited screening capabilities, not suitable for technical traders or strategy-based screening, and lacks customization depth.

Best For

MarketWatch Stock Screener is best suited for first-time investors who want a simple entry point into stock screening combined with immediate access to news, analyst opinions, and market context rather than advanced trading analysis.

10. WallStreetZen Stock Screener

WallStreetZen Stock Screener is built for long-term fundamental investors who prefer structured stock evaluation over technical or intraday trading tools. Its core system, Zen Ratings, simplifies complex financial analysis into a single score-based framework.

Key Free Features and Limits

• Zen Ratings system: Assigns stocks a composite rating based on approximately 115 fundamental factors, including valuation, growth, profitability, risk, and AI-driven analysis.
• Due Diligence Score: Free users can view structured analysis for selected stocks, providing insight into company quality and risk profile.
• Limited screening functionality: Some custom screener creation, saved screening strategies, or deeper analysis features may be restricted in the free version.
• Focus on fundamentals: Designed primarily for long-term investing decisions rather than short-term trading signals or technical chart-based strategies.

Pros and Cons

• Pros: Strong fundamental scoring system, simplified decision-making framework, and useful for identifying long-term quality stocks.
• Cons: Limited free access to deep analysis, some advanced workflows require paid access, and not suitable for day trading or technical trading workflows.

Best For

WallStreetZen is best suited for long-term fundamental investors who want a simplified, score-based approach to stock selection and prefer structured quality ratings over real-time or technical screening tools.

Free Stock Screener Comparison Table

This comparison highlights the Best Free Stock Screeners based on the factors that actually impact decision-making: filter depth, data delay, and most importantly, market coverage.

FAQs About Free Stock Screeners

Can I use ChatGPT as a stock screener?

No, ChatGPT cannot function as a real-time stock screener. It does not have live market data or direct access to screening databases, so it cannot filter stocks dynamically.

Is Finviz the best free stock screener?

Finviz is one of the best free stock screeners for U.S. markets. It is especially strong for fast filtering, but it is limited to U.S. exchanges and delayed data.

Which AI is best for stock screening?

Não existe uma única IA ideal para a seleção de ações, uma vez que esta seleção requer dados de mercado estruturados, e não apenas modelos de linguagem. A maioria dos "filtros de IA" ainda se baseia em bases de dados financeiras tradicionais combinadas com algoritmos de classificação.

O TradingView é melhor que o Finviz?

O TradingView é melhor para gráficos técnicos e cobertura do mercado global. O Finviz é melhor para uma análise rápida focada nos EUA, pelo que a melhor escolha depende do seu estilo de negociação.

Os filtros de ações gratuitos são precisos?

Sim, mas apenas para casos de utilização com atraso e não institucionais. Os filtros gratuitos são geralmente precisos para a geração de ideias, mas muitas vezes não têm precisão em tempo real e profundidade de dados avançada.

Conclusão

As melhores ferramentas gratuitas de seleção de ações dependem do seu estilo de negociação, das suas necessidades de dados e do seu foco no mercado, e não de uma única ferramenta "melhor". Os traders diários e os utilizadores com foco na análise técnica devem priorizar o TradingView ou o Finviz; os principiantes acharão o Yahoo Finance mais adequado; os investidores que procuram a seleção de ações dos EUA e do Vietname com ferramentas de pesquisa de mercado mais abrangentes devem considerar o FastBull; enquanto os investidores com foco em fundamentos de longo prazo beneficiarão mais do WallStreetZen ou do Stock Analysis.