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Crowdsourcing Sentiment Analysis in 2024

“There is too much data but too little time.” 

– Jeanine Evers, Qualitative Researcher at Erasmus University Rotterdam.

As consumer data grows exponentially, it becomes challenging to analyze all of it. So, companies started to use machine-based algorithms to understand their customers’ feelings and thoughts. However, research shows that even though automated methods save time and money for some projects, manually labeling and analyzing the data results in more accurate classifications for others.

To understand consumers’ feelings and thoughts, sentiment analysis is required; however, manual labeling of all consumer data can be labor-intensive and expensive if performed in-house. Many business leaders opt for crowdsourcing methods to mitigate these issues and maintain a high labeling accuracy.

This article examines manual and automated sentiment analysis methods, their strengths and weaknesses, and introduces an alternative method that can compensate for their inadequacies: Crowd-sourcing sentiment analysis. 

Figure 1. A comparison of manual, automated, and crowdsourcing sentiment analysis and their accuracy scores

Source: Communication Methods and Measures

Manual Sentiment Analysis

Companies can identify the intention behind consumers’ reviews, feedback, or texts by manually labeling the terms based on their emotional tone and understanding the sentiment behind texts.


  • Provides in-depth analysis and the most accurate results.
  • Differentiates linguistic nuances such as sarcasm, irony, or slang.
  • Assess the complexity behind texts.


  • Takes a great amount of time.
  • It is expensive.
  • It may include the annotator’s bias.

Automated Sentiment Analysis

As manually labeling the data requires great effort and is time-consuming, companies also use machine learning algorithms to train their dataset and reduce costs. Automated methods extract the relevant data and label the texts based on their emotional tones. 


  • It is cost-efficient and not labor-intensive.
  • Reduces bias in the results.
  • Automated methods provide inclusive and consistent data analysis due to the possibility of data being overlooked in the manual analysis method due to fatigue.


  • Provides misleading results when the dataset in one domain is used to train the algorithm in another discipline.
  • Does not differentiate emojis, slang, sarcasm, or irony. However, emerging technologies started to implement features that can identify language nuances.
  • Requires a large number of data to have high accuracy scores.
  • Has a learning curve.
  • Needs manually coded training data.

Figure 2. The learning curve of machine learning algorithms

Source: Communication Methods and Measures

What is crowdsourcing sentiment analysis, and what are its benefits of it?

Crowdsourcing is a method that has become popular, especially in recent years, and it includes paid workers or volunteers who complete a range of tasks to solve specific problems. As there is human involvement, crowdsourcing methods provide higher accuracy scores regarding consumers’ sentiments. 

What are the benefits of crowdsourcing sentiment analysis?

  • It is more transparent.
  • It provides more accurate results than automated methods, especially in the fields that require subjective decisions such as classifying emotions.
  • It can reduce ambiguity as different people can evaluate the same content.

Figure 3. The benefits of crowdsourcing 

Source: Clickworker

Check our data-driven list of sentiment analysis services to find out which option satisfies your company’s needs.

Please contact us if you have any additional questions about sentiment analysis:

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Access Cem's 2 decades of B2B tech experience as a tech consultant, enterprise leader, startup entrepreneur & industry analyst. Leverage insights informing top Fortune 500 every month.
Cem Dilmegani
Principal Analyst
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Begüm Yılmaz
Begüm is an Industry Analyst at AIMultiple. She holds a bachelor's degree from Bogazici University and specializes in sentiment analysis, survey research, content writing services and Customer Relationship Management (CRM) systems.

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