Migrating Google+ Communities

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Google+ Communities have a number of specific considerations for migration. This page discusses these.

There are over 7.9 million Communities, though an overwhelming number have few if any members. This still leaves a fair number of larger communities -- 57,000 with 1,000 or more members -- and the potential for numerous smaller-but-vital communities. While it's possible to estimate number, membership, and size distribution (see below), measures of activity and vitality are far more difficult. Exploration suggests a relatively small share of truly active communities, perhaps an upper bound of a few percent, and quite possibly far less, of those with more than 100 members being our estimate as of 26 November 2018.

Regardless, there are many groups faced with the question of how or whether to continue themselves, where, and how.

Help create this guide. We are not experts at moving user groups, though we've had some experiences. This page and this Wiki are best when the people affected contribute to it. If you're a G+ Community owner, moderator, or active participant helping to migrate your group and you have a suggestion or correction to make, please do.


Basic practices should resemble those of Recommended Practices, though with a much stronger emphasis on coordinating and communicating with your community.

  • Exchange permanent contact information with contacts and groups. For Communities, creating a specific contact registry or mailing list is strongly recommended.
    • A pinned Community post is easiest to find. Add forwarding information to your Community "About" page.
    • Announce yourself on your destination platform(s).
    • Add your Community to the G+ Notable Communities Database.
  • Talk over and decide on your online/social-media presence after August 2019. Your closest relationships, that is, your immediate community will likely be your biggest influence.
  • Start thinking about data: what you want to keep, what you can delete, and how you want to use it.
  • Google does not offer a Community Export capability. As of late November 2018, there is no tool for making a comprehensive data export. Third-party tools are beginning to appear.
  • Start assessing Google+ alternatives.
  • Start developing a goal-directed plan, timeline, and actions to achieve it.

For scheduling, again, the basics of Exodus Planning and Scheduling apply.

The migration phases we suggest are:

  • Oct 2018 - Dec 2018: Coordination, planning, and exploring alternatives.
  • Jan 2019 - Apr 2019: Execution.
  • May 2019 - Jul 2019: Re-establishing community.
  • Aug 2019 - ∞: Assessment of migration, rebuilding and expanding.

There may be early, late, and middle movers, each option has advantages and disadvantages. We're observing numerous active communities have already either made significant plans or committed to new platforms. Others are still exploring options.

We VERY STRONGLY recommend creating some interim out-of-band and common channel for remaining in touch with and keeping track of your community. A mailing list, or Google or Yahoo Groups is an excellent option, giving you full control. A subreddit does not provide a contact list directly but may also be a useful tool.

Preserving Content and Data


Preserving the Group


Google+ Community Characteristics and Membership

There's been little available useful information about Google+ Community numbers, membership, activity, and other characteristics. We've conducted some basic research to fill in the gaps, largely using Google Plus's own sitemaps and Web-scraping on 22-23 November 2018. This provides guidance on the number and membership of communities, but not activity. Analysis is ongoing as of 24 November 2018. See: "Google+ Communities Membership Analysis Preview".

Google's sitemaps list 7,974,281 total communities.

Sampled and Estimated Community Characteristics

12,000 sampled Communities Characteristics
Statistic Value
n 10,358
sum 1,331,992
min 1
max 217,297
mean 128.595482
median 2
sd 3,301.906970

A sample of 12,000 randomly selected communities gives the following characteristics, with numbers referring to the sample, not all communities. We expect that relative relationships, percentages, means, percentiles, and rankings should hold, roughly.

  • Total public: 10,814 (90.12%)
  • Total private: 1,170 ( 9.75%)
  • Total open-membership communities: 6,586 (54.88%)
  • Total closed-membership membership: 5,414 (45.12%)
  • Total membership (public only): 1,331,812
  • Mean membership (public only): 128.67
  • Total open-community membership: 1,207,115 (90.64%)
  • Total closed-community membership: 124,697 ( 9.36%)
  • Mean membership for open communities: 183.28
  • Mean membership for closed communities: 23.03

Note that membership counts are only available for public communities.

"Open" communities may be joined without moderator approval. "Closed" communities require users "ask to join" and a moderator approve the request.

This gives a percentile distribution, and basis for an extrapolation to the full population.

 %ile Members Estimated Communities
95 118.5 398,714
90 43 797,428
85 22 1,196,142
80 13 1,594,856
75 8 1,993,570
70 5 2,392,284
65 4 2,790,998
60 3 3,189,712
55 2 3,588,426
50 2 3,987,140
45 1 4,385,854

We can also estimate the size of various "buckets" of communities. Here, a size bucket includes all communities with _at least_ the stated number of members, up to the next largest category -1. So '500+' reflects communities having from 500-999 members. The 10,000+ category goes up to the largest G+ community, around 4 million members. Each ranked community represents about 600 actual communities, with extrapolations based on this used for estimation.

Community Members Observed in Sample Estimated Communities
1,000,000+ -- 54
500,000+ -- 101
100,000+ 4 2,400
10,000+ 17 10,200
1,000+ 78 46,800
500+ 70 42,000
250+ 130 78,000
125+ 192 115,200
80+ 194 116,400
40+ 397 238,200
20+ 556 333,600
10+ 787 472,200
9+ 112 67,200
8+ 148 88,800
5+ 658 394,800
4+ 358 214,800
3+ 558 334,800
2+ 992 595,200
1+ 5,104 3,062,400
0 1,649 989,400

Note: Most zero-member communities are private (roughly 9% of the total sample), and may actually have some members. 500k+ and 1m+ estimates are based on CircleCount 16 April 2016 top-200 rankings, re-assessed 25 November 2018.

Non-Public G+ Community Characteristics

These data also give us a basis for estimating the non-public membership, based on "open" and "closed" (free to join, and request required) communities. These are roughly equal in number, 55% open, 45% closed, but closed communities have only about 10% the total membership of open ones. If that relationship holds for public vs. private communities, then the 10% of Google+ Communities which are private likely have only about 1% the membership of public communities.

Assessing G+ Community Activity and Vitality

Again, there are few to no formal tools for doing this, little or no published data, and no forthcoming information from Google itself concerning any aspects of the Google+ sunset since the October 8 announcement, as of late November 2018. We have little to offer other than suggestions.

  • Despite much cheerleading, Google+ Communities have largely proved relatively disappointing by way of either engagement on Google+ or for driving attention to external sites. There are exceptions, but this has been the rule.
  • Individually inspecting Communities should give an assessment of overall health: are there recent posts, are there comments to posts, are those posts substantive or spam? By late November 2018, a very positive sign is whether a community has an ongoing migration plan announced, generally in its description or as a pinned or Administrative post.
  • Community owners and moderators have access to an Insights panel (under the "Manage" button), showing 7 and 30 day statistics for member count, growth, posts, comments, and +1s.
  • We've had some success in estimating site activity by running Google searches limited to a specific site, and looking at the returned item count. It is possible to specify a URL path on a site to further restrict such searches. So, the search site:plus.google.com/communities/112164273001338979772 this will provide a count of occurrences of the common English word "this" within the Google+ Mass Migration community. While not a count of posts, the results are an indicator of content magnitude. You can further restrict searches to a specific date range, if you want to compare recent activity from the past year, say. The results are approximate, but may be useful.

More robust measures of health would typically require the ability to compare posting activity across multiple communities, or direct metadata access. This is not available.

In the past, CircleCount have provided some statistics on Google+ profile and community trends. This is no longer available due both to Google discontinuing the Google+ API and increased privacy regulations in Europe and elsewhere. Archived reports may exist. See also the CircleCount G+ Profile page.

We have asked and strongly urge Google to provide information on active, vital communities on Google+, by some credible measure.

Google+ Resources and Communities

There are several communities on Google+ oriented around Community owners and moderators. We are attempting to work with these. Included are:

  • Google+ Moderators (~1k members) Official (?) G+ moderators' forum, with Google staff as owners.

And of we're directly associated with the Google+ Mass Migration community.