Punyajoy Saha

PhD student

IIT Kharagpur


Punyajoy Saha is a PMRF research scholar in the Department of Computer Science and Engineering at IIT Kharagpur, West Bengal. Currently, he is doing research under the supervision of Prof. Animesh Mukherjee. He is also a member of the research group CNeRG.

Research - His current research interests lie in the intersection of computational social science and natural language processing. He is working in developing better human-in-the-loop mitigation strategies for hate speech and other forms of harmful speech like fear speech. The collection of his efforts as well as his colleagues towards the goal of creating a more inclusive and accepting online environment is present at this website

Reviewer assignment - AAAI 2021, ACL 2020, ACL-IJCNLP 2021, EACL 2021, AAAI 2022, AAAI 2023

Teaching Assistantship - AI and Ethics,Spring 2021 (CS60016), Algorithms-1,Autumn 2021 (CS21003), AI and Ethics,Spring 2022 (CS60016), Information retrieval 2023 (CS60092)

Outside Teaching Assitantship - As a part of PMRF deliverables, I am also a teaching assistant for the NPTEL-NLP course, videos are uploaded weekly here and taking a course on “Programming in C” in Hijli College, Kharagpur (materials to be updated soon).


  • Natural Language Processing
  • Social Computing
  • Hate speech analytics
  • Counter speech generation


  • PhD in Computer Science and Engineering, 2020 - Present

    Indian Institute of Kharagpur,West Bengal

  • B.Tech in Computer Science and Technology, 2015-19

    Indian Institute of Engineering Science Technology, Shibpur

  • CBSE XII Science, 2014-15

    Kendriya Vidyalaya R.K Puram Sec-4 New Delhi

Recent & Upcoming Talks

Generating counter speech with CounterGeDi@CredCo

Recently, many studies have tried to create generation models to assist counter speakers by providing counterspeech suggestions for …

Hate speech: Detection, Mitigation and Beyond @AAAI

In this translation style tutorial presented at AAAI 2022, we present an exposition of hate speech detection and mitigation and also …

Fear speech in Indian Whatsapp groups @ARCS

In this paper, we perform the first large scale study on fear speech across thousands of public WhatsApp groups discussing politics in …

Automating Counterspeech: Challenges and Opportunities

In this invited talk, I talk about how we can automate counterspeech generation and assist the moderators working in this domain. I …

Fear speech in Indian Whatsapp groups@1C2S2

In this paper, we perform the first large scale study on fear speech across thousands of public WhatsApp groups discussing politics in …


List of all publications till date


Intern and Job Experiences


Research Scholar

CNeRG Lab, CSE Department, IIT Kharagpur

Jan 2020 – Present Kharagpur, West Bengal

Broad Research Area - NLP and Social Computing.

Current Research Area - Detection, analysis and countering of hate speech

Courses done during PhD - Natural language processing, Deep learning, High performance computing, Reinforcement learning, Social computing, AI and Ethics


Research Intern

Language Technology group, University of Hamburg

Aug 2019 – Sep 2019 Hamburg, Germany
worked on developing the backend for Forum 4.0 project which a site for new comments analysis

Junior Research Fellow

CNERG Labs, IIT Kharagpur

May 2019 – Dec 2019 Kharagpur
Worked in the project Cognitive Stimuli: Detecting and Generating Exaggeration in Online and Social Media Content (CSAM), funded by Adobe Systems Inc


CNERG Labs, IIT Kharagpur

May 2018 – Apr 2019 Kharagpur

Work included detection of hate speech in online social media.


  • Part of the winning team “Hateminers” at AMI Evalita-2018.
  • Member of the project which is releasing the first ever dataset for analysis of counterspeech at ICWSM-2019


Bluezeal Labs, IIT Bombay

Dec 2017 – Mar 2018 Shibpur, Howrah
Part of the artificial intelligence team of this start-up. Responsibilities include:

  • Developing optical character recognition
  • Developing web scraping and chatbot solutions.


Neurocomputing Lab ,IIT Delhi

May 2017 – Jul 2018 New Delhi, Delhi

Work included analysis of Hindi Letters using eye tracking and neural networks.

Achievements include:

  • Part of the project “Analysis of hindi fonts on reading comprehension” , later a paper on this was selected at IHCI-2018. Major contribution include error reduction of eye tracker using machine learning


  • +919968982501
  • CNeRG Lab, CSE Department, IIT Kharagpur, Kharagpur, West Bengal 721302
  • Enter CSE Dept and take the stairs to Room 205 on 1st Floor
  • Weekdays from 10:00 am to 5:00 pm
  • Book an appointment
  • DM Me