Bluesky experienced rapid user growth in late 2024. The platform's user base expanded from **** million in October 2024 to ** million by October 2025, showcasing its increasing popularity among social media users seeking new options. Surge in downloads and user engagement The platform's growth was particularly notable following the U.S. presidential elections in November 2024, when monthly downloads surged to ********** million. This increase in user adoption coincided with rising demand for Twitter alternatives. Earlier in the year, Bluesky had already shown strong performance, with ****** downloads from Android devices and ****** from iOS devices in July 2024. Moderation challenges and user demographics As Bluesky's user base expanded, so did the need for content moderation. In 2024, the platform received **** million reports to its moderation service, a significant increase from ******* reports in 2023. These reports included **** million for anti-social behavior, *** million for misleading content, and *** million for spam.

As of the latest data, ***** percent of global Bluesky.com visitors were aged between 25 and 34 years. Additionally, just under one third of users were aged between 18 and 24 years.

Launched in February 2023, Bluesky is a microblogging platform that was proposed as a Twitter alternative at the beginning of the year. In July 2024, the Bluesky app generated 38,000 thousand app downloads from Android devices worldwide, while iOS devices generated 30,000 thousand downloads during the month. Bluesky is a semi-decentralized social media, and while users can access the platform only after being invited by members, all internet users can visualize Bluesky posts and content as of the last examined period.

As of September 2025, **** percent of visitors to the bsky.app website were male. Additionally, as of the end of 2024, the decentralized social platform had a total of ** million users, up from **** million in October 2024.

POLITISKY24 (Political Stance Analysis on Bluesky for 2024) is a first-of-its-kind dataset for stance detection, focused on the 2024 U.S. presidential election. It designed for target-specific user-level stance detection and contains 16,044 user-target stance pairs centered on two key political figures, Kamala Harris and Donald Trump. In addition, this dataset includes detailed metadata, such as complete user posting histories and engagement graphs (likes, reposts, and quotes).

Stance labels were generated using a robust and evaluated pipeline that integrates state-of-the-art Information Retrieval (IR) techniques with Large Language Models (LLMs), offering confidence scores, reasoning explanations, and text spans for each label. With an LLM-assisted labeling accuracy of 81%, POLITISKY24 provides a rich resource for the target-specific stance detection task. This dataset enables the exploration of Bluesky platform, paving the way for deeper insights into political opinions and social discourse, and addressing gaps left by traditional datasets constrained by platform policies.

In the uploaded files:

• The file 'Human_annotation_on_validation_users.csv' contains human-annotated stance labels for 445 validation users toward Trump and Harris, resulting in a total of 890 user-target pairs.
  The labels are divided into four stances: 1 (favor), 2 (against), 3 (neutral), and 4 (unrelated). To simplify the stance annotations provided by the large language model, the "neutral" and "unrelated" categories are combined and represented as "neither."
• The file 'LLM_annotation_on_validation_users.json' contains stance labels annotated by a state-of-the-art LLM for 445 validation users toward Trump and Harris, resulting in a total of 890 user-target pairs. In addition to stance labels, each pair includes an explanation of the reasoning, the source tweets, spans from the source tweets used in the reasoning, and a confidence score.
• The file 'LLM_annotation_on_dataset_users.json' is similar to 'LLM_annotation_on_validation_users.json but is generated for all dataset users excluding the validation set. It provides stance labels for 8,022 users toward Trump and Harris, totaling 16,044 user-target pairs.
• The file 'Main_dataset_for_stance_detection.parquet' contains up to 1,000 recent English-language posts (including both original posts and reposts) from each of the 8,022 + 445 = 8,467 users. This file was used for the stance detection task.
• The file 'Bluesky_dataset_on_us_politics.parquet' is similar to 'Main_dataset_for_stance_detection.parquet', but it contains all posts (including both original posts and reposts) from each of the 8,022 + 445 = 8,467 users.
• The file 'Like_network.parquet' captures users' interactions through likes. Specifically, it contains the number of likes each user has given to original posts made by other users. It includes likes from 8,022 + 445 = 8,467 users, but it is not limited to interactions from these users alone.
• The files 'Repost_network.parquet' and 'Quote_network.parquet' are similar to 'Like_network.parquet', but they capture users' interactions through reposts and quotes, respectively.

Comprehensive YouTube channel statistics for @BlueSky, featuring 871,000 subscribers and 329,116,361 total views. This dataset includes detailed performance metrics such as subscriber growth, video views, engagement rates, and estimated revenue. The channel operates in the Lifestyle category and is based in US. Track 251 videos with daily and monthly performance data, including view counts, subscriber changes, and earnings estimates. Analyze growth trends, engagement patterns, and compare performance against similar channels in the same category.

This dataset tracks annual total students amount from 1987 to 2023 for Blue Sky High School

This dataset tracks annual total classroom teachers amount from 1987 to 2023 for Blue Sky High School

This dataset tracks annual total students amount from 2022 to 2023 for Bluesky Virtual Academy

Code To Reproduce the Analysis of "Bluesky Network Topology, Polarization, and Algorithmic Curation" Data Preparation 1. Unzip DIDs.txt.gz which contains all 4,754,059 valid user DIDs used in this analysis 2. Run the download script with: python download_repos_multip.py --mode all This will download all repositories for the DIDs and store them in the Data/DID_REPO/ folder. 3. Run Code/PythonScripts/data_processing.py to create the SQL database. Main Analysis Data Processing Notebooks 00_CreateMBFC.ipynb - Creates mapping of domains to political stances according to Media Bias Fact Check (MBFC) 01_CreateSQL.ipynb - Creates SQL database and exports upload scripts Analysis Notebooks 02_ActivityOverTime.ipynb - Figure 1: Activity over Time, Table 5: Top Domains 03_TrainTransformer.ipynb - Trains model for stance detection on Israel/Palestine content 04_Stance.ipynb - Figure 9: Proportion of Posts by Stance over Time, Table 1: User Activity Distributions, Figures 2 & 3: Distribution of Interactions, Figures 8 & 10: Heatmap of Ideologies vs Neighborhood Ideology, Figure 7: Distribution of Domains by Ideology 05_TopologyOverTime.ipynb - Figures 4 & 5: Structural Measures over Time 06_Feeds.ipynb - Table 2: Top Feeds on Bluesky, Table 4: Distributions of Feeds, Figure 6: Distribution of Interactions with Feeds 07_TopicModel.ipynb - Table 3: Topic Model of Feeds

Historical Dataset of Blue Sky High School is provided by PublicSchoolReview and contain statistics on metrics:Total Students Trends Over Years (1987-2023),Total Classroom Teachers Trends Over Years (1987-2023),Distribution of Students By Grade Trends,Student-Teacher Ratio Comparison Over Years (1987-2023),American Indian Student Percentage Comparison Over Years (2000-2023),White Student Percentage Comparison Over Years (1994-2023),Diversity Score Comparison Over Years (1997-2023),Free Lunch Eligibility Comparison Over Years (1993-2023),Reduced-Price Lunch Eligibility Comparison Over Years (2000-2023)

This dataset tracks annual total students amount from 1996 to 2023 for Blue Sky 7-8 Middle School

This dataset tracks annual total students amount from 2019 to 2023 for Blue Sky Colony - 04

As of March 2023, decentralized social media platform Mastodon had over ten million registered users. In November 2022, there were 2.5 million users registered to the online network, an increase of around 300 percent within five months. Additionally, Mastodon, which shares similar micro-blogging features to Twitter, gained roughly 500 thousand users within ten days of Elon Musk's Twitter takeover on October 27th, 2022.

This dataset tracks annual total classroom teachers amount from 1996 to 2023 for Blue Sky 7-8 Middle School

This dataset tracks annual total classroom teachers amount from 2019 to 2023 for Blue Sky Colony - 04

Historical Dataset of Blue Sky Colony - 04 is provided by PublicSchoolReview and contain statistics on metrics:Total Students Trends Over Years (2019-2023),Total Classroom Teachers Trends Over Years (2019-2023),Distribution of Students By Grade Trends,Student-Teacher Ratio Comparison Over Years (2019-2023),White Student Percentage Comparison Over Years (2019-2023)

This dataset tracks annual total revenue from 2002 to 2023 for Bluesky Charter School District

This dataset tracks annual total expenditure from 2002 to 2023 for Bluesky Charter School District

Historical Dataset of Blue Sky 7-8 Middle School is provided by PublicSchoolReview and contain statistics on metrics:Total Students Trends Over Years (1996-2023),Total Classroom Teachers Trends Over Years (1996-2023),Distribution of Students By Grade Trends,Student-Teacher Ratio Comparison Over Years (1996-2023),American Indian Student Percentage Comparison Over Years (2000-2005),Black Student Percentage Comparison Over Years (2004-2023),White Student Percentage Comparison Over Years (1996-2023),Diversity Score Comparison Over Years (2001-2023),Free Lunch Eligibility Comparison Over Years (1996-2023),Reduced-Price Lunch Eligibility Comparison Over Years (2000-2023)