Should you build with your own proxies and Playwright, or buy a scraping API?

For the worked case, 100,000 usable JavaScript-rendered pages require 105,263 self-run browser attempts under the explicit input of 1.05263 attempts per usable page. At 0.25 MB per attempt, that is 26.31575 GB of residential traffic. One AWS Lightsail browser host plus Webshare’s 50 GB residential tier therefore costs $146.50 per month in published cash. The matched Olostep Standard plan costs $99 per month and includes 200,000 successful requests, so buying is cheaper by $47.50 before labor. (AWS Lightsail bundles, Webshare pricing, and Olostep pricing, retrieved 2026-07-26.)

That result is conditional, not a statement about either route’s production performance. The attempt ratio, payload size, and one-host capacity are scenario inputs. At exactly 1.00 attempt per usable page, the same workload fits the 25 GB proxy tier and the self-run cash falls to $89, which is $10 less than the API plan. One additional attempt pushes traffic above 25 GB and reverses the cash result. Plan cliffs matter more here than a smooth per-page average. (Webshare pricing and Olostep pricing, retrieved 2026-07-26.)

The workload being priced

The workload being priced table

The model uses 1 GB = 1,000 MB because Webshare publishes decimal GB allowances. It rounds required browser attempts up to a whole attempt before selecting a traffic tier. The API side assumes one request billed by Olostep produces one usable page; this is an input to replace with observed target data, not a vendor outcome claim. Olostep states that one request is one webpage or PDF processed, that failed requests are not charged, and that JavaScript rendering and residential IP use are included. (Webshare pricing and Olostep pricing, retrieved 2026-07-26.)

What the self-run stack actually costs

What the self-run stack actually costs table

The self-run published-cash function is:

Attempts(V, R) = ceil(V x R)
Traffic GB      = Attempts(V, R) x MB / 1,000
Build cash      = ($24 x H) + selected proxy tier
Ownership cost  = Build cash + (E / A) + M + U

V is usable pages, R is attempts per usable page, MB is transfer per attempt, and H is the number of browser hosts. The $24 host value and proxy-tier prices are the cited record inputs; every other number produced by this function is calculated arithmetic. (AWS Lightsail bundles and Webshare pricing, retrieved 2026-07-26.)

Fully worked example: 100,000 rendered pages

Self-run Playwright receipt

The baseline uses the scenario inputs exactly:

Attempts = ceil(100,000 usable pages x 1.05263 attempts/page)
         = 105,263 attempts

Traffic  = 105,263 attempts x 0.25 MB
         = 26,315.75 MB
         = 26.31575 GB

The 25 GB allowance is 1.31575 GB short, so the selected proxy tier is Webshare’s 50 GB residential plan:

Playwright license                  $0.00
AWS Lightsail 4 GB host            $24.00
Webshare 50 GB residential plan   $122.50
Incremental storage                 $0.00
                                   -------
Self-run cash floor               $146.50 per month

The prices are published inputs. The one-host capacity and 1.05263 attempt ratio are not established by those sources. (Playwright repository, AWS Lightsail bundles, and Webshare pricing, retrieved 2026-07-26.)

Olostep buy receipt

The current Olostep dataset record and live page agree on the values used in the receipt:

Olostep buy receipt table

The live page also says the request price includes JavaScript rendering, residential IP use, bandwidth, proxies, and data usage. The worked model does not add the separate 500-request trial balance to Standard. (Olostep pricing, retrieved 2026-07-26.)

Required billed requests = 100,000 pages x 1.00 request/page
                         = 100,000 requests

100,000 requests <= 200,000-request Standard allowance
API cash         = $99.00 per month

Cash difference  = $146.50 build - $99.00 buy
                 = $47.50 per month in favor of buying

This is a cash comparison between the named configurations. It assigns no outcome rate to either configuration and no dollar value to labor.

The tier boundary is checkable

At 100,000 pages and 0.25 MB per attempt, the largest attempt ratio that still fits 25 GB is:

25,000 MB / (100,000 pages x 0.25 MB)
= 1.00 attempt per usable page

The next whole attempt changes the selected tier:

The tier boundary is checkable table

The source values in every row are the $24 host, Webshare’s $65 and $122.50 tiers, and the $99 API plan. Attempts, traffic, totals, and differences are calculated from the displayed formulas. (AWS Lightsail bundles, Webshare pricing, and Olostep pricing, retrieved 2026-07-26.)

Let L = (E / A) + M + U. In the first row, ownership cost is $89 + L, so building remains lower than the $99 plan only while L < $10. At L = $10, the cash totals are equal. In the other three rows, buying is already lower before any labor is added. These are algebraic decision limits, not estimates of anyone’s labor.

These are not identical products

The build side is a browser stack using a separately purchased residential traffic allowance. The buy side is a request API whose cited page says browser rendering, residential IP use, proxies, and data usage are included. Playwright provides direct browser automation, while an API request is not a substitute for every interactive session workflow. (Playwright repository, Webshare pricing, and Olostep pricing, retrieved 2026-07-26.)

The comparison therefore answers a narrow question: which named configuration has the lower published monthly cash for the displayed workload inputs? It does not answer whether both routes return identical output on a target.

Which other billing modes need their own arithmetic?

Records that say “premium” or “protected” are not silently treated as residential:

Which other billing modes need their own arithmetic? table

There is no vendor-neutral break-even volume. Measure attempts per usable page, MB per attempt, required host count, setup cost, monthly maintenance, and monthly unblocking work on the actual target. Then rerun the displayed equations with the applicable vendor record rather than transferring the $99 receipt to a different meter.