Backlog by Nulab Inc vs Success.co
Features, use cases, pros and cons, and pricing side by side — and which one to pick.
Quick verdict: Pick Backlog by Nulab Inc for flat-rate project management with built-in code hosting, or Success.co if your leadership team runs on EOS®.
Best for: Software teams that want issue tracking and code hosting under one roof, Agile teams that plan with Kanban boards or Gantt charts
Read the full Backlog by Nulab Inc reviewBest for: Leadership teams already running EOS® who find their current tool slow or outdated, Companies switching from other EOS® platforms like Ninety.io — concierge migration is included at no cost
Read the full Success.co reviewCommission may apply at no extra cost
Backlog by Nulab Inc vs Success.co: features compared
Compare key features side by side
Feature Comparison Summary
Which should you choose?
Choose Backlog by Nulab Inc if
- Your developers need Git, SVN, and tasks in one place
- You want Gantt charts, Kanban boards, and an AI assistant
Choose Success.co if
- Your leadership team runs EOS® and wants licensed, pure terminology
- You're switching EOS® tools and want free concierge migration
- You need offline capture, fast sync, and AI meeting summaries
Backlog by Nulab Inc vs Success.co: pros and cons
Backlog by Nulab Inc
Backlog bundles task tracking, Gantt and Kanban views, docs, and built-in Git and SVN behind flat-rate pricing that never climbs with headcount. The AI Assistant, unlimited Gantt views, and enterprise SSO sit on pricier tiers, though, and storage caps run tight. Overall, it's a solid pick for growing teams that want projects and code on one predictable bill.
Pros
- Flat-rate team pricing instead of per-seat fees — the $35/month Starter plan covers up to 30 users, and Standard and above support unlimited users, so adding teammates never raises the bill
- Built-in Git and Subversion hosting inside the platform—developers can manage repositories, review pull requests, and link commits directly to tasks without switching between a code host and a project tracker
- A working AI Assistant (included on Premium and Enterprise) that builds daily to-do lists, summarizes documents and project progress, flags blockers, and pulls up files and deadlines on demand
Cons
- The AI Assistant is locked behind the $175/month Premium tier or custom-priced Enterprise, and heavy AI usage requires paid credit top-ups ($60–$210/month for 2,000–9,000 additional credits), which erodes the flat-rate value proposition
- Storage limits are tight at every tier—100 MB on Free, 1 GB on Starter, 30 GB on Standard, and 100 GB on Premium—so file-heavy teams may hit ceilings well before user limits
- The Starter plan caps at 30 users and 5 projects, forcing a jump to the $100/month Standard tier for teams just over that line, and Standard restricts Gantt charts to a 6-month view (unlimited views require Premium)
Success.co
Success.co pairs an officially licensed, EOS®-faithful toolkit with BlitzSync™ offline speed, AI meeting summaries, free concierge migration, and a genuinely free plan. Validation rests mostly on vendor claims, calendar sync is Google- and Microsoft-only, and the enterprise add-ons get pricey. Overall, it's a strong pick for committed EOS® teams, and a poor fit for anyone else.
Pros
- Officially licensed EOS® software whose terminology and layout were refined with input from 30+ seasoned EOS Implementers®, so V/TO, Level 10 Meetings, Rocks, Scorecards, Issues, Headlines, and Accountability Charts stay true to the EOS Model® with no rebranded terms to relearn.
- BlitzSync™ offline mode lets you capture Issues, To-Dos, and Headlines without Wi-Fi on desktop or mobile apps, with near-zero load times, instant saves, and real-time updates pushed to the whole team once you reconnect.
- AI meeting summaries and smart rocks handle post-meeting notes and goal tracking automatically, cutting the follow-up admin after every Level 10 session.
Cons
- The product is built exclusively around the EOS Model®, so it won't fit OKR-only, hybrid, or non-EOS workflows, and it deliberately relies on integrations rather than replacing your broader tool stack.
- Calendar sync covers only Google and Microsoft, so teams on other calendar systems lose one of the headline integrations.
- Public validation is thin — testimonials come from the vendor's own site, and there's no third-party review presence on G2, Capterra, or Trustpilot to cross-check claims like 'zero load times.'
Backlog by Nulab Inc and Success.co in detail
Backlog by Nulab Inc
Backlog is a project management platform from Nulab Inc. It combines task tracking, Agile boards, Gantt charts, bug tracking, and team documentation in one tool.
Developers can manage Git and SVN code without leaving the app, and an AI assistant summarizes updates and drafts documents. Nulab says more than 4 million users worldwide rely on it.
Standout features
- Plan work your way
- Your AI teammate for smarter project management
- Manage code where your work lives
- Keep everything in one place
Use cases
- Run Agile sprints without the guesswork
- Keep code and tasks in one place
- Coordinate marketing campaigns and deadlines
- Grow your team without growing the bill
Success.co
Success.co is an officially licensed EOS® traction software built for leadership teams running the Entrepreneurial Operating System. It covers the core EOS® toolkit — V/TO, Level 10 Meetings, Rocks, Scorecards, Issues, Headlines, and Accountability Charts — plus AI meeting summaries and smart rocks. A panel of 30+ EOS Implementers® helped shape it, and it fits both growing companies and the implementers who coach them.
Standout features
- Speed that keeps meetings moving
- Officially licensed. EOS® pure.
- Deeply integrated with your day
- AI handles the meeting follow-up
- Simple by design
Use cases
- Run Faster Level 10 Meetings
- Work Anywhere, Even Offline
- Switch Tools Without the Pain
- Coach Every Client With Confidence
Pricing compared
List prices from each vendor's pricing page, before taxes and add-ons. Costs are per month.
| Pricing compared | Backlog by Nulab Inc | Success.co |
|---|---|---|
| From (cheapest paid plan) | $35/mo Starter | $12/mo All Inclusive Plan · per user |
| Free plan | Yes 10 users | Yes Foundational EOS® tools only; no credit card or contract required |
| Free trial | Not stated | 30 days |
| Money-back guarantee | Not stated | Not stated |
| Annual billing savings | — | Up to 8% |
| Pricing model | Flat price | Per-user and flat plans |
| Cost for 1 user | Free Free plan, billed annually | Free Free Forever Plan plan, billed annually |
| Cost for 5 users | FreeCheaper Free plan, billed annually | $55/mo All Inclusive Plan plan, billed annually |
| Cost for 10 users | FreeCheaper Free plan, billed annually | $110/mo All Inclusive Plan plan, billed annually |
| Cost for 25 users | $35/moCheaper Starter plan, billed monthly | $300/mo All Inclusive Plan plan, billed monthly |
| Plans | 5 | 4 |
| Prices checked | Checked Oct 13, 2026 | Checked Oct 13, 2026 |
| Price history | Tracking prices since Sep 9, 2026. No price change detected yet. | Tracking prices since Sep 9, 2026. No price change detected yet. |
- Cheapest plan that fits each team size. Per-user plans are multiplied by the number of users (respecting stated minimums and seat packs). Plans that include some users cost their base price plus the extra-user price for each user beyond those included. Flat-priced plans with no stated user limit are counted as one licence per user.
Cheaper for your team size
For 5 users (billed annually), Backlog by Nulab Inc costs $0/mo vs Success.co at $55/mo.
- Backlog by Nulab Inc is cheaper at every team size we checked (1 to 25 users).
- For 1 user (billed annually), Backlog by Nulab Inc and Success.co both cost $0/mo.
- For 10 users (billed annually), Backlog by Nulab Inc costs $0/mo vs Success.co at $110/mo.
- For 25 users (billed monthly), Backlog by Nulab Inc costs $35/mo vs Success.co at $300/mo.
- Both tools have a free plan.
Computed from published list prices on the dates shown. Excludes taxes, add-ons and promotions.
More comparisons
Frequently Asked Questions
Can I use both tools together?
There's no direct integration between them, but they solve different jobs. Some companies run Backlog for software project delivery while leadership runs EOS® in Success.co.