This page provides information about the usage of the Let's Encrypt Challenge project, including summaries across all versions and details for each release. For each week beginning on the given date the figures show the number of sites that reported they are using a given version of the project.

Let's Encrypt Challenge project page
Usage statistics for all projects

Show legacy data
Week starting 1.x 1.0.x 1.1.x 1.2.x Total
June 14th, 2026 0 3 163 118 284
June 7th, 2026 0 2 173 122 297
May 31st, 2026 0 2 172 121 295
May 24th, 2026 0 2 164 125 291
May 17th, 2026 0 2 183 142 327
May 10th, 2026 0 2 169 144 315
May 3rd, 2026 0 2 165 145 312
April 26th, 2026 0 2 152 136 290
April 19th, 2026 0 2 191 135 328
April 12th, 2026 0 4 200 143 347
April 5th, 2026 0 2 146 122 270
March 29th, 2026 0 2 133 123 258
March 22nd, 2026 0 2 120 127 249
March 15th, 2026 0 2 126 120 248
March 8th, 2026 0 2 120 106 228
February 22nd, 2026 0 2 134 119 255
February 15th, 2026 0 2 133 108 243
February 8th, 2026 0 2 134 127 263
February 1st, 2026 0 2 136 112 250
January 25th, 2026 0 2 148 118 268
January 18th, 2026 0 2 146 146 294
January 11th, 2026 0 2 140 144 286
January 4th, 2026 0 2 130 100 232
December 28th, 2025 0 2 161 62 225
December 21st, 2025 0 2 153 58 213
December 14th, 2025 0 2 170 72 244
December 7th, 2025 0 2 183 70 255
November 30th, 2025 0 2 177 59 238
November 23rd, 2025 0 2 168 63 233
November 16th, 2025 0 2 157 56 215
November 9th, 2025 0 2 166 47 215
November 2nd, 2025 0 2 124 60 186
October 26th, 2025 0 2 120 52 174
October 19th, 2025 0 2 124 48 174
October 12th, 2025 0 2 129 46 177
October 5th, 2025 0 2 121 45 168
September 28th, 2025 0 2 121 47 170
September 21st, 2025 0 2 118 47 167
September 14th, 2025 0 2 136 50 188
September 7th, 2025 0 2 119 52 173
August 31st, 2025 0 2 114 39 155
August 24th, 2025 0 2 129 49 180
August 17th, 2025 0 2 125 36 163
August 10th, 2025 0 2 123 40 165
August 3rd, 2025 0 2 118 31 151
July 27th, 2025 0 2 122 34 158
July 20th, 2025 0 2 110 42 154
July 13th, 2025 0 3 117 49 169
July 6th, 2025 0 3 148 37 188
June 29th, 2025 0 3 143 34 180
June 22nd, 2025 0 2 146 45 193
June 15th, 2025 0 2 133 46 181
June 8th, 2025 0 2 134 44 180
June 1st, 2025 0 2 136 45 183
May 25th, 2025 0 2 139 40 181
May 18th, 2025 0 2 136 40 178
May 11th, 2025 0 2 143 50 195
May 4th, 2025 0 3 135 28 166
April 27th, 2025 0 2 113 29 144
April 20th, 2025 0 3 111 33 147
April 13th, 2025 0 3 111 31 145
April 6th, 2025 0 3 131 29 163
March 30th, 2025 0 2 119 30 151
March 23rd, 2025 0 3 121 29 153
March 16th, 2025 0 3 138 31 172
March 9th, 2025 0 3 145 34 182
March 2nd, 2025 0 3 147 29 179
February 23rd, 2025 0 2 146 29 177
February 16th, 2025 0 4 150 33 187
February 9th, 2025 0 4 150 29 183
February 2nd, 2025 0 5 140 30 175
January 26th, 2025 0 4 162 17 183
January 19th, 2025 0 4 139 14 157
January 12th, 2025 0 3 144 12 159
January 5th, 2025 0 3 155 17 175
December 29th, 2024 0 3 138 1 142
December 22nd, 2024 0 3 138 9 150
December 15th, 2024 0 3 160 10 173
December 8th, 2024 0 4 161 6 171
December 1st, 2024 0 3 149 1 153
November 24th, 2024 0 3 143 1 147
November 17th, 2024 0 3 159 1 163
November 10th, 2024 0 4 159 1 164
November 3rd, 2024 0 4 181 1 186
October 27th, 2024 0 3 191 1 195
October 20th, 2024 0 4 180 1 185
October 13th, 2024 0 4 170 0 174
October 6th, 2024 0 3 165 0 168
September 29th, 2024 0 4 150 0 154
September 22nd, 2024 0 3 167 1 171
September 15th, 2024 0 3 170 0 173
September 8th, 2024 0 4 202 0 206
September 1st, 2024 0 4 196 0 200
August 25th, 2024 0 4 203 0 207
August 18th, 2024 0 5 197 0 202
August 11th, 2024 0 6 196 0 202
August 4th, 2024 0 7 206 1 214
July 28th, 2024 0 6 203 0 209
July 21st, 2024 0 8 193 0 201
July 14th, 2024 0 6 182 0 188
July 7th, 2024 0 6 175 0 181
June 30th, 2024 0 12 159 0 171
June 23rd, 2024 0 11 149 0 160
June 16th, 2024 0 12 154 0 166
June 9th, 2024 0 7 153 0 160
June 2nd, 2024 0 8 148 0 156
May 26th, 2024 0 7 157 0 164
May 19th, 2024 0 6 141 0 147
May 12th, 2024 0 7 135 0 142
May 5th, 2024 0 11 149 0 160
April 28th, 2024 0 10 134 0 144
April 21st, 2024 0 7 135 0 142
April 14th, 2024 0 12 135 0 147
April 7th, 2024 0 8 72 0 80
March 31st, 2024 0 8 72 0 80
March 24th, 2024 0 12 74 0 86
March 17th, 2024 0 10 75 0 85
March 10th, 2024 0 9 67 0 76
March 3rd, 2024 0 10 90 0 100
February 25th, 2024 0 10 94 0 104
February 18th, 2024 0 9 102 0 111
February 11th, 2024 0 9 93 0 102
February 4th, 2024 1 11 82 0 94
January 28th, 2024 0 13 75 0 88
January 21st, 2024 0 13 67 0 80
January 14th, 2024 0 13 50 0 63
January 7th, 2024 0 11 50 0 61
December 31st, 2023 0 11 48 0 59
December 24th, 2023 0 9 45 0 54
December 17th, 2023 0 15 49 0 64
December 10th, 2023 0 12 50 0 62
December 3rd, 2023 0 16 47 0 63
November 26th, 2023 0 14 48 0 62
November 19th, 2023 0 13 45 0 58
November 12th, 2023 0 10 51 0 61
November 5th, 2023 0 14 58 0 72
October 29th, 2023 0 15 46 0 61
October 22nd, 2023 0 14 58 0 72
October 15th, 2023 0 15 51 0 66
October 8th, 2023 0 13 56 0 69
October 1st, 2023 0 15 58 0 73
September 24th, 2023 0 16 43 0 59
September 17th, 2023 0 14 56 0 70
September 10th, 2023 0 16 54 0 70
September 3rd, 2023 0 13 51 0 64
August 27th, 2023 0 10 52 0 62
August 20th, 2023 0 16 49 0 65
August 13th, 2023 0 14 32 0 46
August 6th, 2023 0 30 51 0 81
July 30th, 2023 0 16 39 0 55
July 23rd, 2023 0 12 41 0 53
July 16th, 2023 0 15 37 0 52
July 9th, 2023 0 16 40 0 56
July 2nd, 2023 0 13 36 0 49
June 25th, 2023 0 16 54 0 70
June 18th, 2023 0 15 52 0 67
June 11th, 2023 0 19 52 0 71
June 4th, 2023 0 16 37 0 53
May 28th, 2023 0 17 38 0 55
May 21st, 2023 0 16 51 0 67
May 14th, 2023 0 20 81 0 101
May 7th, 2023 0 25 69 0 94
April 30th, 2023 0 15 67 0 82
April 23rd, 2023 0 16 78 0 94
April 16th, 2023 0 21 72 0 93
April 9th, 2023 0 20 66 0 86
April 2nd, 2023 0 23 70 0 93
March 26th, 2023 0 90 70 0 160
March 19th, 2023 0 128 58 0 186
March 12th, 2023 0 169 51 0 220
March 5th, 2023 0 157 66 0 223
February 26th, 2023 0 167 58 0 225
February 19th, 2023 0 167 52 0 219
February 12th, 2023 0 164 53 0 217
February 5th, 2023 0 173 51 0 224
January 29th, 2023 0 190 61 0 251
January 22nd, 2023 0 191 45 0 236
January 15th, 2023 0 194 31 0 225
January 8th, 2023 0 206 32 0 238
January 1st, 2023 0 215 27 0 242
December 25th, 2022 0 189 22 0 211
December 18th, 2022 0 204 16 0 220
December 11th, 2022 0 212 9 0 221
December 4th, 2022 0 224 0 0 224
November 27th, 2022 0 230 0 0 230
November 20th, 2022 0 242 0 0 242
November 13th, 2022 0 231 0 0 231
November 6th, 2022 0 219 0 0 219
October 30th, 2022 0 225 0 0 225
October 23rd, 2022 0 230 0 0 230
October 16th, 2022 0 243 0 0 243
October 9th, 2022 0 255 0 0 255
October 2nd, 2022 0 234 0 0 234
September 25th, 2022 0 224 0 0 224
September 18th, 2022 0 236 0 0 236
September 11th, 2022 0 215 0 0 215
September 4th, 2022 0 235 0 0 235
August 28th, 2022 0 239 0 0 239
August 21st, 2022 0 229 0 0 229
August 14th, 2022 0 225 0 0 225
August 7th, 2022 0 231 0 0 231
July 31st, 2022 0 235 0 0 235
July 24th, 2022 0 238 0 0 238
July 17th, 2022 0 234 0 0 234
July 10th, 2022 0 223 0 0 223
July 3rd, 2022 0 231 0 0 231
June 26th, 2022 0 260 0 0 260
June 19th, 2022 0 259 0 0 259
June 12th, 2022 0 278 0 0 278
June 5th, 2022 0 279 0 0 279
May 29th, 2022 0 279 0 0 279
May 22nd, 2022 0 285 0 0 285
May 15th, 2022 0 281 0 0 281
May 8th, 2022 0 316 0 0 316
May 1st, 2022 0 279 0 0 279
April 24th, 2022 0 329 0 0 329
April 17th, 2022 0 286 0 0 286
April 10th, 2022 0 270 0 0 270
April 3rd, 2022 0 292 0 0 292
March 27th, 2022 0 278 0 0 278
March 20th, 2022 0 304 0 0 304
March 13th, 2022 0 303 0 0 303
March 6th, 2022 0 373 0 0 373
February 27th, 2022 0 406 0 0 406
February 20th, 2022 0 411 0 0 411
February 13th, 2022 0 421 0 0 421
February 6th, 2022 0 400 0 0 400
January 30th, 2022 0 397 0 0 397
January 23rd, 2022 0 396 0 0 396
January 16th, 2022 0 423 0 0 423
January 9th, 2022 0 391 0 0 391
January 2nd, 2022 0 358 0 0 358
December 26th, 2021 0 398 0 0 398
December 19th, 2021 0 404 0 0 404
December 12th, 2021 0 375 0 0 375
December 5th, 2021 0 315 0 0 315
November 28th, 2021 0 503 0 0 503
November 21st, 2021 0 611 0 0 611
November 14th, 2021 0 566 0 0 566
November 7th, 2021 0 510 0 0 510
October 31st, 2021 0 344 0 0 344
October 24th, 2021 0 100 0 0 100
October 17th, 2021 0 29 0 0 29
October 10th, 2021 0 24 0 0 24
October 3rd, 2021 0 23 0 0 23
September 26th, 2021 0 19 0 0 19
September 19th, 2021 0 14 0 0 14
September 12th, 2021 0 8 0 0 8
September 5th, 2021 0 12 0 0 12
August 29th, 2021 0 12 0 0 12
August 22nd, 2021 0 14 0 0 14
August 15th, 2021 0 11 0 0 11
August 8th, 2021 0 14 0 0 14
August 1st, 2021 0 8 0 0 8
July 25th, 2021 0 11 0 0 11
July 18th, 2021 0 8 0 0 8
July 11th, 2021 0 6 0 0 6
July 4th, 2021 0 1 0 0 1
June 27th, 2021 0 1 0 0 1

Recent release usage

Release June 14th, 2026 June 7th, 2026 May 31st, 2026 May 24th, 2026 May 17th, 2026 May 10th, 2026
7.x-1.2 54 59 53 52 54 55
1.0.0 3 2 2 2 2 2
1.1.0 163 173 172 164 183 169
1.2.0-beta1 118 122 121 125 142 144

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