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Best alternatives to Manganum: Sidebar with Gmail and Google Calendar (2026)

10 Chrome extensions that do a similar job to Manganum, closest first. Each shows real store users, its rating, how recently it was updated and how many permissions it asks for.

Manganum: reviews, users and permissionsBest Tools extensions

Manganum: Sidebar with Gmail and Google Calendar today

≈50K users3.3★ from 1.2K ratingsUpdated 4 weeks ago20 permissions

Manganum alternatives, compared

  1. 1

    Resize Gmail Sidebar by cloudHQ

    Now you can resize the label column in Gmail

    ≈20K users4.7★ from 92 ratingsUpdated 12 months ago5 permissions
    • About 2.5× fewer users than Manganum
    • Rated 1.4 stars higher
    • Updated less recently
    • Asks for fewer permissions (5 vs 20)
    Resize Gmail Sidebar by cloudHQ alternativesCompare side by side
  2. 2

    Sidebar for Google Tasks

    Access Google Tasks directly in Chrome’s sidebar (side panel)—stay organized without needing Gmail or Google Calendar.

    ≈30K users4.6★ from 118 ratingsUpdated 2 months ago3 permissions
    • About 1.7× fewer users than Manganum
    • Rated 1.4 stars higher
    • Asks for fewer permissions (3 vs 20)
    • Listed under Workflow & Planning
    Sidebar for Google Tasks alternativesCompare side by side
  3. 3

    UBC Workday Side by Side Calendar

    Calendar for the new UBC Workday course selection.

    ≈10K users5.0★ from 39 ratingsUpdated 8 months ago6 permissions
    • About 5.0× fewer users than Manganum
    • Rated 1.7 stars higher
    • Updated less recently
    • Asks for fewer permissions (6 vs 20)
    Compare side by side
  4. 4

    Bookmark Sidebar

    Bookmark Sidebar gives you quick access to all your bookmarks in a clean, fast sidebar, right where you need it.

    ≈300K users4.2★ from 1.7K ratingsUpdated 13 days ago9 permissions
    • About 6.0× more users than Manganum
    • Rated 0.9 stars higher
    • Asks for fewer permissions (9 vs 20)
    • Listed under Workflow & Planning
    Bookmark Sidebar alternativesCompare side by side
  5. 5

    Cloze Sidebar for CRM

    See everything about your contacts and deals in one place - automatically

    ≈6K users4.5★ from 17 ratingsNot updated for 2+ years21 permissions
    • About 8.3× fewer users than Manganum
    • Updated less recently
    • Asks for more permissions (21 vs 20)
    • Listed under Workflow & Planning
    Cloze Sidebar for CRM alternativesCompare side by side
  6. 6

    Google Calendar Quick Add

    Create event on Google Calendar from selected text.

    ≈3K users4.0★ from 11 ratingsUpdated 6 months ago2 permissions
    • About 17× fewer users than Manganum
    • Updated less recently
    • Asks for fewer permissions (2 vs 20)
    Google Calendar Quick Add alternativesCompare side by side
  7. 7

    Open in Sidebar

    Drop any link to the sidebar for dual-pane access

    ≈4K users4.4★ from 30 ratingsNot updated for 2+ years7 permissions
    • About 13× fewer users than Manganum
    • Rated 1.1 stars higher
    • Updated less recently
    • Asks for fewer permissions (7 vs 20)
    • Listed under Workflow & Planning
    Open in Sidebar alternativesCompare side by side
  8. 8

    Calendar Clarity

    Color-code Google Calendar with unlimited colors that sync to your phone, group your labels, dim the noise, and focus with a timer.

    ≈10K users4.1★ from 59 ratingsUpdated 7 weeks ago2 permissions
    • About 5.0× fewer users than Manganum
    • Rated 0.8 stars higher
    • Asks for fewer permissions (2 vs 20)
    Calendar Clarity alternativesCompare side by side
  9. 9

    Copilot sidebar for Chrome

    Microsoft Copilot sidebar ported from Edge to Chrome

    ≈100K users2.3★ from 136 ratingsUpdated 18 months ago5 permissions
    • About 2.0× more users than Manganum
    • Rated 0.9 stars lower
    • Updated less recently
    • Asks for fewer permissions (5 vs 20)
    • Listed under Workflow & Planning
    Copilot sidebar for Chrome alternativesCompare side by side
  10. 10

    Desmos Sidebar

    Allows for graphing calculator to be launched on any global site

    ≈10K users5.0★ from 18 ratingsUpdated 16 months ago1 permissions
    • About 5.0× fewer users than Manganum
    • Updated less recently
    • Asks for fewer permissions (1 vs 20)
    • Listed under Education
    Desmos Sidebar alternativesCompare side by side

Manganum alternatives: questions

What is the best alternative to Manganum?

By users, the most popular alternative is Bookmark Sidebar with ≈300K users and a 4.2-star rating. The closest match by what it does is Resize Gmail Sidebar by cloudHQ.

Which Manganum alternative has the best rating?

Resize Gmail Sidebar by cloudHQ has the highest rating of these alternatives with 50+ ratings: 4.7 out of 5 from 92 ratings.

Is there a Manganum alternative that asks for fewer permissions?

Desmos Sidebar asks for 1 permissions, against 20 for Manganum.

How many alternatives to Manganum are there?

We list 10 close alternatives to Manganum on the Chrome Web Store, picked by what they do and ranked by how close they are.

Users and ratings are the figures shown on the Chrome Web Store, re-checked continuously. Alternatives are matched on name, description, category and topic. Browse best-of lists by niche.