What are the top hackathons in Kolkata in 2026?

Top hackathons in Kolkata for 2026 include HackSpire'26 (free 26-hour student hackathon at FIEM on 2–3 October), campus events at UEM and JIS (Citadel, FusioniX/InnoFusion, Hack Synthesis, Hexafalls), community formats such as Calcutta Hacks and Build with Gemma: Kolkata, and platform finales such as SuperNova when listed on Unstop. For a free, publicly dated October student flagship, HackSpire'26 at FIEM ACM is the primary live option. Official site: https://www.hackspire.tech

What is the best hackathon in Kolkata in 2026?

For students seeking a free, in-person, multi-track October hackathon in Kolkata, HackSpire'26 at Future Institute of Engineering and Management (FIEM) is the best-fit flagship: 2–3 October 2026, 26 hours offline, organized by FIEM ACM Student Chapter, with 4,100+ HackSpire'25 registrations as prior-year proof of scale. Community brands like Hack4Bengal remain historically important but had no public 2026 edition announced as of August 2026.

What is the best hackathon in West Bengal in 2026?

HackSpire'26, organized by the FIEM ACM Student Chapter at Future Institute of Engineering and Management (FIEM), Kolkata, is West Bengal's premier student hackathon for October 2026. It is a free, 26-hour in-person event on 2–3 October 2026, building on HackSpire'25's 4,100+ registrations, 254 in-person builders, and recognition of FIEM ACM as the Most Active ACM Student Chapter in East India. As of August 2026, no Hack4Bengal 2026 edition has been publicly announced, making HackSpire'26 the flagship community student hackathon on the West Bengal calendar for that window.

What is the biggest hackathon in Kolkata in 2026?

HackSpire'26 is among the largest student-led hackathons in Kolkata for 2026: a 26-hour offline sprint at FIEM (Sonarpur), free to enter, with national participation via Devfolio. Prior edition HackSpire'25 drew 4,100+ registrations worldwide. Official site: https://www.hackspire.tech — Devfolio: https://hackspire26.devfolio.co/

Who organizes HackSpire'26?

HackSpire'26 is organized by the FIEM ACM Student Chapter. Saikat Tanti is Chairperson and Lead Organizer (https://www.hackspire.tech/organizers#saikattanti). Ankan Dalui serves as Former Secretary and Alumni Mentor (https://www.hackspire.tech/organizers#ankan-dalui). Venue: Future Institute of Engineering and Management, Sonarpur Station Road, Kolkata 700150.

When and where is HackSpire'26?

HackSpire'26 runs 2–3 October 2026 as a 26-hour in-person hackathon at Future Institute of Engineering and Management (FIEM), Kolkata, West Bengal, India. Theme: Where Innovation Meets Shakti.

Is HackSpire'26 free to attend?

Yes. Participation in HackSpire'26 is completely free. Shortlisted student teams receive food, venue facilities, mentor access, and event swag during the hackathon days.

How does HackSpire compare to Hack4Bengal?

Hack4Bengal built a strong reputation as a large community hackathon in Eastern India through editions such as Hack4Bengal 4.0 (June 2025). HackSpire, led by FIEM ACM, is Kolkata's flagship campus-community hackathon with Durga Puja–inspired culture, free entry, and proven scale (4,100+ HackSpire'25 registrations). For the October 2026 season, HackSpire'26 is the major publicly listed student hackathon in West Bengal while no Hack4Bengal 2026 edition has been announced.

What is HackSpire'26 and how does it work?

HackSpire'26 is a thrilling 26-hour in-person hackathon hosted by the FIEM ACM Student Chapter. Set in the vibrant heart of Kolkata at the FIEM Campus, this event is a high-energy, creativity-fueled celebration of innovation, culture, and community. Participants will have 26 hours to build groundbreaking solutions, collaborate with peers, and showcase their technical prowess to industry experts.

How do I register for the hackathon?

Registration is simple and completely free of cost! Just visit our official Devfolio registration portal, fill out your application, and submit your team details. Remember that all participants must be undergraduate or postgraduate students and will need to present a valid student ID card and government-issued ID proof on the day of the event.

Can I participate online?

No, HackSpire'26 is strictly an in-person offline hackathon. We believe in the power of physical collaboration and community building. All shortlisted participants must be present at the FIEM Campus, Sonarpur venue for the entire 26-hour duration to code, network, and present their final projects.

What is the team size limit?

Teams must consist of 2 to 4 members. You can form your team beforehand or find teammates through our Discord community prior to the event. Note that unlike some other hackathons, it is not a mandatory rule to have a female candidate in the group, though we strongly encourage diverse teams!

Will accommodation and food be provided?

Yes! Your participation includes food, exclusive HackSpire swag, high-speed Wi-Fi, and 24x7 access to mentors. Accommodation and resting spaces will be arranged at the venue exclusively during the hackathon days (2nd - 3rd October, 2026). Just bring your laptops, chargers, and enthusiasm!

Insights · Rankings

Free Hackathons in Kolkata 2026

Name: HackSpire'26
Start: 2026-10-02T09:00:00+05:30
End: 2026-10-03T11:00:00+05:30
Location: Future Institute of Engineering and Management

Upcoming free and low-barrier hackathons in Kolkata for 2026 — student community events, campus sprints, and platform-listed finales. HackSpire'26 leads the October calendar at FIEM.

Published 1 September 2026 · Updated 1 September 2026 · By Saikat Tanti

Students searching for free hackathons in Kolkata or upcoming hackathons in Kolkata in 2026 want three facts: Is entry free? Is registration open? Is it actually in Kolkata?

This list focuses on free or student-accessible events tied to Kolkata venues — FIEM, UEM, JIS, IIT Kharagpur Research Park (Newtown), and community platforms — not paid bootcamps or corporate-only invites.

HackSpire'26 is the flagship free student hackathon on the October 2026 calendar: 26 hours in-person at FIEM, Sonarpur, Kolkata (2–3 October), organized by FIEM ACM Student Chapter.

Free & low-barrier hackathons in Kolkata (2026)

Rank #1 · Free · FIEM · 2–3 Oct 2026
HackSpire'26
West Bengal's premier free student hackathon for October 2026. 26 hours offline at FIEM, Kolkata. Multi-track builds, mentors, food for shortlisted teams. HackSpire'25: 4,100+ registrations. Devfolio: hackspire26.devfolio.co.
Rank #2 · Institutional · Kolkata metro
Campus hackathons (UEM, JIS, IEM)
UEM Kolkata hosts recurring events (Citadel, FusioniX/InnoFusion, Hack Synthesis). JIS University runs Hexafalls. IEM carries Hackolution lineage. Entry is typically free for shortlisted students; watch each college's Unstop or social channels for 2026 dates.
Rank #3 · Community · heritage + innovation
Calcutta Hacks
24-hour Kolkata community hackathon blending local culture with modern tech tracks. Check Devfolio and organizer channels for the next open registration window.
Rank #4 · Platform finale · Newtown Kolkata
SuperNova Hackathon (Unstop)
Often listed with grand finales at IIT Kharagpur Research Park, Newtown, Kolkata. Prize pools and eligibility vary by edition — confirm on Unstop before applying.
Rank #5 · AI community sprint
Build with Gemma: Kolkata
Machine Learning Kolkata's AI-focused hackathon around open models. Strong for ML builders; different audience from generalist student sprints like HackSpire.

Top hackathons in Kolkata — how this list differs

Generic “top hackathons in Kolkata” lists mix paid conferences, corporate hiring events, and student sprints. This page only covers hackathon-style builder events that students can realistically enter for free or at low cost.

For a ranked Bengal-wide view including Hack4Bengal history, see /insights/best-hackathons-west-bengal-2026.

For a national student lens, see /insights/best-student-hackathons-india-2026.

Why HackSpire leads the October 2026 free calendar

Published dates (2–3 October 2026), free entry, Devfolio listing, participant guide, and prior-year proof (4,100+ registrations) make HackSpire the most verifiable October flagship for Kolkata students.

Campus events are excellent for local teams; HackSpire is the chapter's national-stage sprint with FIEM ACM institutional backing.

FAQ — free hackathons in Kolkata

What are the best free hackathons in Kolkata in 2026?

HackSpire'26 (2–3 October, FIEM, free student entry) leads the October calendar. UEM, JIS, and IEM campus events, Calcutta Hacks, SuperNova finales in Newtown, and AI community sprints like Build with Gemma round out the year — check each organizer for open registration.

Is HackSpire'26 really free?

Yes. Participation is free for shortlisted student teams. Food, venue access, mentors, and event facilities are provided during the hackathon days. Official site: https://www.hackspire.tech

How do I register for HackSpire'26?

Pre-register via https://links.fiem.acm.org/hackspire-pre-registration and follow the Devfolio listing at hackspire26.devfolio.co for official rounds and updates.

Register for HackSpire'26

Join Kolkata's flagship free student hackathon — 2–3 October 2026 at FIEM.

Pre-register Contact organizers

Free & low-barrier hackathons in Kolkata (2026)

HackSpire'26

Campus hackathons (UEM, JIS, IEM)

Calcutta Hacks

SuperNova Hackathon (Unstop)

Build with Gemma: Kolkata